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Pentagon Diamond

Geometric Pentagon Diamond Pavé Cluster Sculptural Dome Band Ring 14K/18K Gold
Geometric Pentagon Diamond Pavé Cluster Sculptural Dome Band Ring 14K/18K Gold

Geometric Pentagon Diamond Pavé Cluster Sculptural Dome Band Ring 14K/18K Gold

Located in Wan Chai District, HK

These diamond blocks introduce texture and light, offering a subtle contrast against the smooth metal surface.

Category

21st Century and Contemporary Hong Kong Contemporary Band Rings

Materials

White Diamond, Diamond, Platinum, Yellow Gold, White Gold, Rose Gold, 18...

Turtle Brown Black Diamond 18 Karat Australian Pearl Gold Pendant/Necklace
Turtle Brown Black Diamond 18 Karat Australian Pearl Gold Pendant/Necklace

Turtle Brown Black Diamond 18 Karat Australian Pearl Gold Pendant/Necklace

By Elisa Pozza by PETRONILLA

Located in Bussolengo, Verona

The legs are set with brown diamonds, while the eyes are two black diamonds. Five brown diamonds are set on the turtle's shell to form an imaginary pentagon.

Category

2010s Italian Artisan Pendant Necklaces

Materials

Black Diamond, Brown Diamond, Pearl, South Sea Pearl, Gold, 18k Gold

Fancy Yellow diamond ring sun art deco diamond ring 18KT ring Rare Find
Fancy Yellow diamond ring sun art deco diamond ring 18KT ring Rare Find

Fancy Yellow diamond ring sun art deco diamond ring 18KT ring Rare Find

Located in Boca Raton, FL

Sun designer ring with boasting center pentagon diamond and baguette diamonds, center is also made with one single diamond under gallery for extra sparkle!

Category

21st Century and Contemporary Cocktail Rings

Vintage Platinum Semi Mount Ring with 1.5 Carat Diamonds Fits 16.6-14.9 MM Stone
Vintage Platinum Semi Mount Ring with 1.5 Carat Diamonds Fits 16.6-14.9 MM Stone

Vintage Platinum Semi Mount Ring with 1.5 Carat Diamonds Fits 16.6-14.9 MM Stone

Located in New York, NY

With intricate craftsmanship, this piece features two enchanting pentagonal diamonds, 0.73 carat E color VS2 clarity, and 0.77 carat D color SI2 clarity, each with its own tale to te...

Category

20th Century Engagement Rings

Materials

Diamond, Platinum

Diamond White Gold Pentagonal Earrings
Diamond White Gold Pentagonal Earrings

Diamond White Gold Pentagonal Earrings

Located in New York, NY

These classic lever-back earrings feature a pentagonal shape crafted in 14k white gold and set with brilliant-cut round diamonds of an estimated 0.40 carats.

Category

1990s American Lever-Back Earrings

Materials

Diamond, 14k Gold, White Gold

Roman Malakov 1.68 Carat Diamond Pentagon Pendant Necklace
Roman Malakov 1.68 Carat Diamond Pentagon Pendant Necklace

Roman Malakov 1.68 Carat Diamond Pentagon Pendant Necklace

By Roman Malakov

Located in New York, NY

A beautiful pendant necklace, featuring three rows of round brilliant-cut diamonds weighing a total of 0.65 carats, set in an openwork pentagon-shaped design.

Category

21st Century and Contemporary American Contemporary Pendant Necklaces

Materials

Diamond, Yellow Gold, Platinum

Pentagonal Amethyst with Rubies and Diamonds, Cuff Bracelet, Palladium
Pentagonal Amethyst with Rubies and Diamonds, Cuff Bracelet, Palladium

Pentagonal Amethyst with Rubies and Diamonds, Cuff Bracelet, Palladium

Located in New York, NY

A stunning show-stopper cuff/bracelet with a large pentagon-shaped faceted amethyst in the center, with a half-moon design on the side with round rubies and baguette diamonds.

Category

21st Century and Contemporary Cuff Bracelets

Materials

Amethyst, Diamond, Ruby, Palladium

18K Gold Stepped Pentagon Star Necklace with Natural Diamonds
18K Gold Stepped Pentagon Star Necklace with Natural Diamonds

18K Gold Stepped Pentagon Star Necklace with Natural Diamonds

Located in Hong Kong, HK

Inspired by the mysteries of the cosmos, this meticulously crafted 18K gold pendant features a dimensional pentagram motif with a stepped geometric design. At its center shines a pre...

Category

21st Century and Contemporary Hong Kong Modern Pendant Necklaces

Materials

Diamond, 18k Gold

Unique Platinum Gold 3.6ctw GIA Tourmaline Diamond Pentagonal Pendant Necklace
Unique Platinum Gold 3.6ctw GIA Tourmaline Diamond Pentagonal Pendant Necklace

Unique Platinum Gold 3.6ctw GIA Tourmaline Diamond Pentagonal Pendant Necklace

Located in Montclair, NJ

--Stone(s):-- (1) Natural Genuine Tourmaline - Pentagonal Cut - Bezel Set - Rich Green Color - 3.27ct (exact) ** See Certification Details Below for Complete Info ** (25) Natural Gen...

Category

21st Century and Contemporary Pendant Necklaces

Materials

Diamond, Tourmaline, Gold, 18k Gold, Yellow Gold, Platinum

14 Karat White Gold and Diamond Pentagon Hoop Earrings #19529
14 Karat White Gold and Diamond Pentagon Hoop Earrings #19529

14 Karat White Gold and Diamond Pentagon Hoop Earrings #19529

Located in Washington Depot, CT

14 Karat White Gold and Diamond Pentagon Hoop Earrings These sparkling pentagon shaped hoop earrings each feature 15 round brilliant cut diamonds set in 14K white gold.

Category

20th Century Contemporary Hoop Earrings

Materials

Diamond, 14k Gold, White Gold

Natural Black Diamond(2.31CT) Pentagon Pendant in 14 Karat Yellow Gold
Natural Black Diamond(2.31CT) Pentagon Pendant in 14 Karat Yellow Gold

Natural Black Diamond(2.31CT) Pentagon Pendant in 14 Karat Yellow Gold

By Raja Jewels

Located in New York, NY

Bold, architectural, and effortlessly modern, this pendant features a natural black diamond in a striking pentagon shape, beautifully cut in a rose cut style to highlight its subtle,...

Category

2010s Indian Pendant Necklaces

Materials

Diamond, Black Diamond, 14k Gold, Yellow Gold

Roman Malakov 0.63 Carat Total Round Brilliant Diamond Pentagon Pendant Necklace
Roman Malakov 0.63 Carat Total Round Brilliant Diamond Pentagon Pendant Necklace

Roman Malakov 0.63 Carat Total Round Brilliant Diamond Pentagon Pendant Necklace

By Roman Malakov

Located in New York, NY

A beautiful pendant necklace, featuring three rows of round brilliant cut diamonds, set in an open-work pentagon design. The middle row is set with yellow diamonds weighing 0.22 cara...

Category

21st Century and Contemporary American Modern Pendant Necklaces

Materials

Diamond, Yellow Diamond, 18k Gold, Platinum, Yellow Gold

14"-16" Natural Brown Diamond(0.93ct) Pentagon Choker Necklace in 14KY Gold
14"-16" Natural Brown Diamond(0.93ct) Pentagon Choker Necklace in 14KY Gold

14"-16" Natural Brown Diamond(0.93ct) Pentagon Choker Necklace in 14KY Gold

By Raja Jewels

Located in New York, NY

A modern classic with an architectural edge, this choker necklace features a captivating 0.93ct natural brown pentagon-shaped diamond, seamlessly integrated into the chain for a clea...

Category

2010s American Choker Necklaces

Materials

Diamond, Brown Diamond, 14k Gold, Yellow Gold

Roman Malakov 2.13 Carats Pentagon Cut Yellow Diamond Halo Pendant Necklace
Roman Malakov 2.13 Carats Pentagon Cut Yellow Diamond Halo Pendant Necklace

Roman Malakov 2.13 Carats Pentagon Cut Yellow Diamond Halo Pendant Necklace

By Roman Malakov

Located in New York, NY

A stylish pendant necklace, showcasing a 2.13 carats pentagon cut yellow diamond weighing 2.13 carats, bezel-set in 18K white gold.

Category

21st Century and Contemporary American Contemporary Pendant Necklaces

Materials

Diamond, Yellow Diamond, 18k Gold, White Gold

Pentagonal Blue & Yellow Sapphire Cocktail Ring with Diamonds 18K Yellow Gold
Pentagonal Blue & Yellow Sapphire Cocktail Ring with Diamonds 18K Yellow Gold

Pentagonal Blue & Yellow Sapphire Cocktail Ring with Diamonds 18K Yellow Gold

Located in Scottsdale, AZ

Ring Size: 6.75 Metal: 18 Karat Yellow Gold Gemstones: Natural Sapphires & Diamonds Sapphire Carat Weight: 5.33 Carats Sapphire Cut: Pentagon Sapphire Colors: Yellow & Blue D...

Category

20th Century Unknown Contemporary Cocktail Rings

Materials

Diamond, Sapphire, Blue Sapphire, Yellow Sapphire, Gold, 18k Gold, Yello...

1.03ct Fancy Pentagon Ceylon Blue Sapphire & Diamond 18k Gold Halo Signet Ring
1.03ct Fancy Pentagon Ceylon Blue Sapphire & Diamond 18k Gold Halo Signet Ring

1.03ct Fancy Pentagon Ceylon Blue Sapphire & Diamond 18k Gold Halo Signet Ring

By Gems and Jewels UK

Located in Birmingham, GB

Natural Fancy Pentagon Cut Vivid Ceylon Blue Sapphire 18k Yellow Gold Diamond Halo Signet Ring. 1.03 Carat total. 0.65 Carat natural sapphire with a unique fancy pentagon cut and br...

Category

21st Century and Contemporary Cluster Rings

Materials

Diamond, White Diamond, Sapphire, Blue Sapphire, Gold, 18k Gold, Yellow ...

Vintage 14k Yellow Gold Pentagon Shaped Smoky Quartz Gemstone Ring
Vintage 14k Yellow Gold Pentagon Shaped Smoky Quartz Gemstone Ring

Vintage 14k Yellow Gold Pentagon Shaped Smoky Quartz Gemstone Ring

Located in Boca Raton, FL

Total Weight: 10 g (6.4 dwt) Additional Details: This item comes with a Diamonds by Raymond Lee Presentation Box! SKU: R6528 To begin, step into bold elegance with this 14k Yellow G...

Category

21st Century and Contemporary Unknown Modern Cocktail Rings

Materials

Quartz, Yellow Gold, 14k Gold

J.E. Caldwell Platinum Diamond Clip Pins
J.E. Caldwell Platinum Diamond Clip Pins

J.E. Caldwell Platinum Diamond Clip Pins

By J.E. Caldwell & Co.

Located in Philadelphia, PA

This platinum and diamond pin by J.E. Caldwell features a stunning arrangement of emerald cut, baguette, pentagon, and round-cut diamonds, with the versatile design allowing it to be...

Category

20th Century Unknown Brooches

Materials

Diamond, Platinum, 14k Gold, White Gold

Piaget Earrings Emerald 18 Carat Yellow Gold Diamonds Earrings
Piaget Earrings Emerald 18 Carat Yellow Gold Diamonds Earrings

Piaget Earrings Emerald 18 Carat Yellow Gold Diamonds Earrings

By Piaget

Located in Paris, FR

PIAGET 18 Carat yellow Gold Diamonds and Emerald Earrings. Piaget Pentagonal shaped Earrings composed of Diamond Pavements separated by Emerald Spacers calibrated Baguette Size Set w...

Category

1990s Swiss Clip-on Earrings

Materials

Diamond, Emerald, 18k Gold, Yellow Gold

Cartier French Art Deco Diamond and Platinum Bracelet, 18.70 Carats, Circa 1929
Cartier French Art Deco Diamond and Platinum Bracelet, 18.70 Carats, Circa 1929

Cartier French Art Deco Diamond and Platinum Bracelet, 18.70 Carats, Circa 1929

By Cartier

Located in London, GB

A French, Art Deco, Cartier strap bracelet, comprising three, rectangular, flexible, openwork, pavé set diamond panels, each centre has a trap-cut diamond, in a claw setting, flanked...

Category

Vintage 1920s French Art Deco Retro Bracelets

Materials

Diamond, Platinum

18k Adler Genève 13-14ct Brilliant Cut Diamond, 5ct Baguette Estate Sultan Oman
18k Adler Genève 13-14ct Brilliant Cut Diamond, 5ct Baguette Estate Sultan Oman

18k Adler Genève 13-14ct Brilliant Cut Diamond, 5ct Baguette Estate Sultan Oman

By Adler

Located in Antwerp, BE

Qaboos bin Said Al Said was Sultan of Oman from 23 July 1970 until his death in 2020 Centre Brilliant Cut Diamond : 13-14 Ct VS1 Diamonds : 45 Baguette, Pentagon, Baguette ,Trapeze ...

Category

21st Century and Contemporary Swiss Artisan Pendant Necklaces

Materials

Diamond, 18k Gold

Certified Bi Colour Blue & Yellow Fancy Sapphire And Diamond 18k White Gold Ring
Certified Bi Colour Blue & Yellow Fancy Sapphire And Diamond 18k White Gold Ring

Certified Bi Colour Blue & Yellow Fancy Sapphire And Diamond 18k White Gold Ring

By Gems and Jewels UK

Located in Birmingham, GB

Unique Natural Blue And Yellow Bi Colour Fancy Pentagon Cut Sapphire And Diamond 18k White Gold Halo Ring. 1.17 Total Carat.

Category

21st Century and Contemporary British Cluster Rings

Materials

Diamond, White Diamond, Sapphire, Blue Sapphire, Yellow Sapphire, Gold, ...

Sunita Nahata Blue Topaz 18.43ct. Drop Earring in 18KWG with Amethyst & Diamond
Sunita Nahata Blue Topaz 18.43ct. Drop Earring in 18KWG with Amethyst & Diamond

Sunita Nahata Blue Topaz 18.43ct. Drop Earring in 18KWG with Amethyst & Diamond

By Sunita Nahata

Located in Hong Kong, HK

Amethyst: 0.65 carat, 6X4mm size, Pentagon Kite shape. White Diamond: 0.55 carat, 1.20mm size, round shape, G color, VS clarity.

Category

21st Century and Contemporary Thai Contemporary Drop Earrings

Materials

Amethyst, White Diamond, Topaz, Blue Topaz, Gold, 18k Gold, White Gold

Star Engagement Ring
Star Engagement Ring

Star Engagement Ring

By John Brevard

Located in Coral Gables, FL

This magical piece is for that special person who sees the world differently. This unique pentagon cut diamond will be custom created to your specifications.

Category

2010s American Modern Engagement Rings

Materials

White Diamond, 18k Gold

Recent Sales

Long Pentagonal Emerald 4.5ct and Diamond Pendant in 18K Gold
Long Pentagonal Emerald 4.5ct and Diamond Pendant in 18K Gold

Long Pentagonal Emerald 4.5ct and Diamond Pendant in 18K Gold

Located in Dublin, IE

A colourful and bright natural pentagnoal cut Emerald 13X10mm (4.5ct) is set with 21 round Diamonds (1.13ct), a pear shaped Diamond (.28ct) and six baguette Diamonds (.16ct.). The p...

Category

2010s Irish Contemporary Pendant Necklaces

Materials

Emerald, Diamond, 18k Gold

Diamond Sapphire Ring Diamond Wedding Band 18 Karat White Gold 1.20 Carat
Diamond Sapphire Ring Diamond Wedding Band 18 Karat White Gold 1.20 Carat

Diamond Sapphire Ring Diamond Wedding Band 18 Karat White Gold 1.20 Carat

Located in Melbourne, FL

The engagement ring has .45 carat total weight of round brilliant cut diamonds and .50 carat total weight of two pentagon shaped sapphires.

Category

21st Century and Contemporary American Contemporary Engagement Rings

Materials

White Diamond, Blue Sapphire, 18k Gold

Pentagon Diamond Bangle

Pentagon Diamond Bangle

By Ri Noor

Located in Houston, TX

Pentagon shaped diamond (0.25 ctw) bangle in 14k rose gold Flexible bangle 60mm Diameter

Category

2010s Cuff Bracelets

Cartier Pentagonal Diamond Collar with Original Box
Cartier Pentagonal Diamond Collar with Original Box

Cartier Pentagonal Diamond Collar with Original Box

By Cartier

Located in Carmel-by-the-Sea, CA

Decorated with brilliant white diamonds, 2.00 carats in total, that grade as E-F color and Vvs 1-2 clarity, the asymmetric pentagonal centerpiece is connected to the braided golden c...

Category

Late 20th Century French Link Necklaces

Materials

Diamond, 18k Gold

Diamond Pave and Pentagon Amethyst Yellow Gold and Platinum Ring
Diamond Pave and Pentagon Amethyst Yellow Gold and Platinum Ring

Diamond Pave and Pentagon Amethyst Yellow Gold and Platinum Ring

Located in Southampton, PA

Boasting both stylish looks and luxurious allure thanks to the incredibly offbeat design and compelling gemstone décor, this ring is a definite head-turner that will attractively acc...

Category

20th Century More Rings

Materials

Amethyst, White Diamond, Diamond, 18k Gold, Yellow Gold, Platinum

Men's 14K White Gold Pentagon Shaped 1.00 Carat Diamond Band Ring
Men's 14K White Gold Pentagon Shaped 1.00 Carat Diamond Band Ring

Men's 14K White Gold Pentagon Shaped 1.00 Carat Diamond Band Ring

Located in New York, NY

A men's diamond band that is elegantly designed with a pentagon-shaped cluster of round diamonds surrounded by a further halo of diamonds.

Category

21st Century and Contemporary Indian Contemporary Cluster Rings

Materials

Diamond, White Diamond, 14k Gold, White Gold

Diamond Pave and Pentagon Amethyst Yellow Gold and Platinum Ring
Diamond Pave and Pentagon Amethyst Yellow Gold and Platinum Ring

Diamond Pave and Pentagon Amethyst Yellow Gold and Platinum Ring

Located in Southampton, PA

Boasting both stylish looks and luxurious allure thanks to the incredibly offbeat design and compelling gemstone décor, this ring is a definite head-turner that will attractively acc...

Category

20th Century More Rings

Materials

Amethyst, White Diamond, 18k Gold, Yellow Gold, Platinum

Diamond Pave and Pentagon Amethyst Yellow Gold and Platinum Ring
Diamond Pave and Pentagon Amethyst Yellow Gold and Platinum Ring

Diamond Pave and Pentagon Amethyst Yellow Gold and Platinum Ring

Located in Southampton, PA

Boasting both stylish looks and luxurious allure thanks to the incredibly offbeat design and compelling gemstone décor, this ring is a definite head-turner that will attractively acc...

Category

20th Century More Rings

Materials

Amethyst, White Diamond, 18k Gold, Yellow Gold, Platinum

GIA Pentagon Emerald and White Diamond Rosecut Cocktail Ring in Platinum
GIA Pentagon Emerald and White Diamond Rosecut Cocktail Ring in Platinum

GIA Pentagon Emerald and White Diamond Rosecut Cocktail Ring in Platinum

Located in Los Angeles, CA

Stunning 8.06 ct. emerald pentagon with a GIA 2.01 ct. H VS2 rosecut and 0.75 ct. white diamond rounds.

Category

21st Century and Contemporary Cocktail Rings

Materials

White Diamond, Emerald, Platinum

Mens Retro Vintage 14k Gold 0.30ct European Diamond Pentagon Synthetic Ruby Ring
Mens Retro Vintage 14k Gold 0.30ct European Diamond Pentagon Synthetic Ruby Ring

Mens Retro Vintage 14k Gold 0.30ct European Diamond Pentagon Synthetic Ruby Ring

Located in Montclair, NJ

--Stone(s):-- (1) Natural Genuine Diamond - Old European Cut - Pave Set - G Color - VS1 Clarity - 0.30ctw (approx.) (1) Synthetic Ruby - Unique Pentagon Cut - Bezel Set - Vivid Red C...

Category

Vintage 1940s Retro Cocktail Rings

Materials

Diamond, Ruby, 14k Gold

18k Yellow Gold 5.68ct Pentagon Cut Deep Pink Tourmaline & Diamond Grooved Ring
18k Yellow Gold 5.68ct Pentagon Cut Deep Pink Tourmaline & Diamond Grooved Ring

18k Yellow Gold 5.68ct Pentagon Cut Deep Pink Tourmaline & Diamond Grooved Ring

Located in Montclair, NJ

--Stone(s):-- (1) Natural Genuine Rubellite Tourmaline - Elongated Pentagon Cut - Bezel Set - Deep Pink Color - 5.02ct (exact) Natural Genuine Diamonds - 15 Round Brilliant & 9 B...

Category

21st Century and Contemporary Cocktail Rings

Materials

Diamond, Tourmaline, Gold, 18k Gold, Yellow Gold

31.30 Carat Natural Pentagon Cut Citrine Necklace 14 Karat
31.30 Carat Natural Pentagon Cut Citrine Necklace 14 Karat

31.30 Carat Natural Pentagon Cut Citrine Necklace 14 Karat

Located in New York, NY

Natural Honey color citrine Brilliant Pentagon cut. Clean Clarity 26 X 23mm Side natural diamonds: 1.30ct.

Category

2010s American Pendant Necklaces

Materials

Citrine, Diamond, 14k Gold, Yellow Gold

Geometric Diamond Sapphire Pendant Earrings
Geometric Diamond Sapphire Pendant Earrings

Geometric Diamond Sapphire Pendant Earrings

Located in Miami, FL

Quintessentially Art Deco in elaborate details, these enchanting earrings incorporate  diamond-studded pentagonal, circular and triangular profiles, with pave-set diamonds within art...

Category

Mid-20th Century Unknown Art Deco Drop Earrings

Materials

Diamond, Blue Sapphire, 18k Gold

Art Deco Diamond Platinum Engagement Ring
Art Deco Diamond Platinum Engagement Ring

Art Deco Diamond Platinum Engagement Ring

Located in Miami, FL

The triangular profiles around the setting are each set with a diamond, complemented by bejeweled shoulders. The diamonds adorning the shoulders are set within pentagonal settings.

Category

Vintage 1920s American Art Deco Engagement Rings

Materials

Diamond, Platinum

European Diamond Emerald Platinum Engagement Ring
European Diamond Emerald Platinum Engagement Ring

European Diamond Emerald Platinum Engagement Ring

Located in Miami, FL

This quintessentially Art Deco finger adornment depicts a circular plaque measuring 20mm in diameter, centered with a significant 3.02 ct genuine European-cut diamond graded I-J colo...

Category

Early 20th Century Art Deco Engagement Rings

Materials

Diamond, Emerald, Platinum

Antique Art Deco Diamond Sapphire Platinum Pendant Earrings
Antique Art Deco Diamond Sapphire Platinum Pendant Earrings

Antique Art Deco Diamond Sapphire Platinum Pendant Earrings

Located in Miami, FL

Quintessentially These enchanting antique earrings incorporate diamond-studded pentagonal, circular and triangular profiles, all sparkling with pave-set European-cut diamonds within ...

Category

Mid-20th Century Unknown Art Deco Chandelier Earrings

Materials

Diamond, Sapphire, Platinum

18K White Gold Cognac Diamond, Tourmaline & Amethyst Millegrain Ring
18K White Gold Cognac Diamond, Tourmaline & Amethyst Millegrain Ring

18K White Gold Cognac Diamond, Tourmaline & Amethyst Millegrain Ring

By Joke Quick

Located in Antwerp, BE

One of a kind Millegrain Ring in 18K White gold 6,1 g. set with a Cognac diamond 0,54 ct., pentagon cut Tourmaline, a hexagon cut Amethyst and natural coloured purple diamonds 0,61c...

Category

2010s Belgian Contemporary Fashion Rings

Materials

Amethyst, Diamond, Brown Diamond, Tourmaline, 18k Gold, White Gold

Sophia D Diamond Platinum Ring 5.08 Carat Square Emerald Cut GIA
Sophia D Diamond Platinum Ring 5.08 Carat Square Emerald Cut GIA

Sophia D Diamond Platinum Ring 5.08 Carat Square Emerald Cut GIA

Located in Beverly Hills, CA

Classic design, perfect proportions, fine quality diamonds! The ring is made of platinum and features a 5.08-carat square emerald cut diamond flanked by a tapered pentagon shape diam...

Category

21st Century and Contemporary American Engagement Rings

Materials

White Diamond, Platinum

Stunning 18 kt. Yellow Gold Ring with 1.08 ct Natural Diamonds - IGI Certificate
Stunning 18 kt. Yellow Gold Ring with 1.08 ct Natural Diamonds - IGI Certificate

Stunning 18 kt. Yellow Gold Ring with 1.08 ct Natural Diamonds - IGI Certificate

Located in רמת גן, IL

1.08 Carat Fancy Dark Brown Pentagon Modified Brilliant Diamond Ring This stunning art deco style ring features a 0.88 carat fancy dark brown pentagon modified brilliant diamond wit...

Category

2010s Israeli Cluster Rings

Materials

Diamond, 18k Gold, Yellow Gold

Stunning 4.90ct Diamonds 3-Stone Ring in 18k White and Yellow Gold
Stunning 4.90ct Diamonds 3-Stone Ring in 18k White and Yellow Gold

Stunning 4.90ct Diamonds 3-Stone Ring in 18k White and Yellow Gold

Located in רמת גן, IL

Enhancing its allure are two unique pentagon-shaped side diamonds totaling 0.80 carats.

Category

2010s Israeli Three-Stone Rings

Materials

Diamond, 18k Gold, White Gold, Yellow Gold

1.53 Ct. GIA Step Cut Diamond "Arrow" Ring From Bespoke by Platt Collection
1.53 Ct. GIA Step Cut Diamond "Arrow" Ring From Bespoke by Platt Collection

1.53 Ct. GIA Step Cut Diamond "Arrow" Ring From Bespoke by Platt Collection

Located in Los Angeles, CA

American Made 1.53 Ct. Pentagonal Step Cut Diamond Ring from Bespoke by Platt Collection, composed of 18k yellow gold.

Category

2010s American Contemporary Cocktail Rings

Materials

Diamond, 18k Gold, Yellow Gold

Diamond and Emerald Yellow Gold Brooch, Art Deco, Antique, circa 1930
Diamond and Emerald Yellow Gold Brooch, Art Deco, Antique, circa 1930

Diamond and Emerald Yellow Gold Brooch, Art Deco, Antique, circa 1930

Located in Jesmond, Newcastle Upon Tyne

The brooch features an exceptional scrolling bow design accented with a feature independently bezel set 0.22Ct and 0.25Ct diamonds, in addition to two impressive triangular and penta...

Category

Vintage 1930s Unknown Art Deco Brooches

Materials

Diamond, Emerald, 14k Gold, Yellow Gold

Art Deco White Diamond, Emerald, Ruby, Sapphire and Platinum Clip Brooch
Art Deco White Diamond, Emerald, Ruby, Sapphire and Platinum Clip Brooch

Art Deco White Diamond, Emerald, Ruby, Sapphire and Platinum Clip Brooch

Located in New York, NY

There are three pentagonal form baguette cut diamonds the center of the pyramidal form at the base flanked on either side by two 10 point square cut sapphires.

Category

Vintage 1930s American Art Deco Brooches

Materials

Diamond, Emerald, Ruby, Sapphire, Platinum

Pentagon Shape Diamond Bar Openwork Band Ring 1.65 Carat 18 Karat Yellow Gold
Pentagon Shape Diamond Bar Openwork Band Ring 1.65 Carat 18 Karat Yellow Gold

Pentagon Shape Diamond Bar Openwork Band Ring 1.65 Carat 18 Karat Yellow Gold

By Harbor Diamonds

Located in New York, NY

Superb 18K Yellow gold openwork ring featuring 10 round brilliants weighing 1.65 carats. Average Stone: 0.16 PTS Color G Clarity SI Size 6.25 Sizeable free of charge

Category

1990s American Contemporary Cocktail Rings

Materials

Diamond, 18k Gold, Yellow Gold

18 Karat White Gold Natural South Sea Pearl and Diamond Drop Earrings
18 Karat White Gold Natural South Sea Pearl and Diamond Drop Earrings

18 Karat White Gold Natural South Sea Pearl and Diamond Drop Earrings

By Gems Paradise

Located in Jaipur, IN

18 Karat White Gold Natural South Sea Pearl and Diamond Drop Earrings This immaculate uncanny ovalish-round pearl drop with the elegant pentagonal diamond stud top is a magnificent...

Category

21st Century and Contemporary Indian Art Deco Drop Earrings

Materials

Diamond, South Sea Pearl, 18k Gold, White Gold

Diamond White Gold Pentagonal Earrings
Diamond White Gold Pentagonal Earrings

Diamond White Gold Pentagonal Earrings

Located in New York, NY

These classic lever-back earrings feature a pentagonal shape crafted in 14k white gold and set with brilliant-cut round diamonds of an estimated 0.40 carats.

Category

1990s American Lever-Back Earrings

Materials

Diamond, 14k Gold, White Gold

Pentagonal Ruby Diamond Gold Earrings
Pentagonal Ruby Diamond Gold Earrings

Pentagonal Ruby Diamond Gold Earrings

Located in Darnestown, MD

Unusual handmade five sided gold earrings centered with an oval cabochon ruby that is surrounded by diamonds. The earrings are 1 1/4" at their widest and 1" tall. Omega backs can b...

Category

Vintage 1980s Unknown Lever-Back Earrings

Materials

Ruby, 18k Gold

1.18ct Pentagon Ruby Engagement Ring Set Diamond Crown Band 14k Gold AD1686S-12
1.18ct Pentagon Ruby Engagement Ring Set Diamond Crown Band 14k Gold AD1686S-12

1.18ct Pentagon Ruby Engagement Ring Set Diamond Crown Band 14k Gold AD1686S-12

By Aurora Designer

Located in Osprey, FL

. ♥♥ If you are interested in one of the rings only, please contact us to create a custom listing for you ♥ The engagement ring features a stunning pentagon shape ruby set in solid...

Category

2010s American Engagement Rings

Materials

Diamond, Ruby, 14k Gold, White Gold

Colombian Emerald Diamond Platinum Engagement Ring
Colombian Emerald Diamond Platinum Engagement Ring

Colombian Emerald Diamond Platinum Engagement Ring

Located in Miami, FL

This fascinating vintage engagement ring with an enchanting 'intense green' genuine emerald-cut emerald and a duo of brilliant pentagonal-cut diamonds is crafted in solid platinum, w...

Category

21st Century and Contemporary Modern Three-Stone Rings

Materials

Diamond, Emerald, Platinum

CONCH PEARL, DIAMOND  AND PLATINUM NECKLACE
CONCH PEARL, DIAMOND  AND PLATINUM NECKLACE

CONCH PEARL, DIAMOND AND PLATINUM NECKLACE

Located in San Francisco, CA

ONE PENTAGONAL DIAMOND,1.03 CTS,DVVS1 DROP CONCH EQUALS FABULOUS VERY RARE NATURAL CONCH PEARL NECKLACE ,ONE DROP CONCH .4.16CTS,19 CONCH EQUALS 38.86 CTS,19 BRIOLETTE DIAMONDS,APP...

Materials

Platinum

Pentagonal Fancy Brown and White Diamond Ring
Pentagonal Fancy Brown and White Diamond Ring

Pentagonal Fancy Brown and White Diamond Ring

Located in Greenwich, CT

Pentagonal-shaped fancy brown diamond ring, the brown diamond weighing approximately 1.04 carats, mounted within a white diamond-set surround with partway white diamond-set shoulders...

Category

21st Century and Contemporary American Cocktail Rings

Materials

Diamond, Platinum

American Art Deco Diamond Sapphire Ring
American Art Deco Diamond Sapphire Ring

American Art Deco Diamond Sapphire Ring

Located in Wimberley, TX

At the shoulders baguette cut sapphires and single cut accent diamonds flank and embellish a pair of pentagonal shaped cartouches.

Category

American More Rings

Materials

Diamond

2.91 Asscher-Cut Diamond Solitiare Art Deco Ring - GIA G/VS2
2.91 Asscher-Cut Diamond Solitiare Art Deco Ring - GIA G/VS2

2.91 Asscher-Cut Diamond Solitiare Art Deco Ring - GIA G/VS2

Located in San Francisco, CA

This bright icy-white, ultra-sparkling vintage emerald-cut (a.k.a. Asscher-cut) diamond beaming between a pair of fancy step-cut pentagonal epaulet diamonds.

Category

Vintage 1930s Art Deco Solitaire Rings

Materials

Diamond, White Diamond, Platinum

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NALLY GIA Pink Color Heart Shape Diamond Ring
NALLY GIA Pink Color Heart Shape Diamond Ring

NALLY GIA Pink Color Heart Shape Diamond Ring

By Cartier

Located in New York, NY

NALLY 2.02ct Fancy Purple- Pink Diamond Ring. The diamond is set in a Cartier Mounting with 2 Tapered Baguette Cut Diamonds, with an approximately total carat weight of 0.25CT, stamp...

Category

2010s American Artist Solitaire Rings

Materials

Pink Diamond, 18k Gold

Ladybug 18Kt White Yellow Gold Australian Pearl Charm Pendant / Necklace
Ladybug 18Kt White Yellow Gold Australian Pearl Charm Pendant / Necklace

Ladybug 18Kt White Yellow Gold Australian Pearl Charm Pendant / Necklace

By Elisa Pozza by PETRONILLA

Located in Bussolengo, Verona

Ladybug/Ladybird 18 Kt Red White Gold Australian Pearl Pendant Necklace Made in Italy A very beautiful and big gold Australian pearl has been carefully crafted to make a ladybug, It ...

Category

2010s Italian Contemporary Pendant Necklaces

Materials

Pearl, Gold, 18k Gold, White Gold, Yellow Gold

5.18 Carat Fancy Yellow Marquis-Cut Diamond 18k Gold Engagement Ring GIA Report
5.18 Carat Fancy Yellow Marquis-Cut Diamond 18k Gold Engagement Ring GIA Report

5.18 Carat Fancy Yellow Marquis-Cut Diamond 18k Gold Engagement Ring GIA Report

Located in New York, NY

Absolutely stunning engagement ring style features a 5.18 Carat Fancy Yellow, Marquee Cut Diamond that sparkles and shines with every movement. Set in 18K Gold Engagement Ring certif...

Category

21st Century and Contemporary American Contemporary Engagement Rings

Materials

Yellow Diamond, 18k Gold, Yellow Gold

GIA Natural 3.01 Carat Radiant Cut Diamond 18-Karat Engagement Ring In Stock
GIA Natural 3.01 Carat Radiant Cut Diamond 18-Karat Engagement Ring In Stock

GIA Natural 3.01 Carat Radiant Cut Diamond 18-Karat Engagement Ring In Stock

By Raymond Lee Jewelers

Located in Boca Raton, FL

GIA 18k Yellow Gold Natural 3.01 Carat Radiant Cut Diamond Engagement Ring This exquisite GIA-certified 18k Yellow Gold engagement ring features a 3.01-carat radiant-cut diamond, co...

Category

21st Century and Contemporary American Modern Engagement Rings

Materials

Diamond, Gold, 18k Gold, Yellow Gold

Emilio Jewelry Gia Certified Fancy Blue Diamond Ring
Emilio Jewelry Gia Certified Fancy Blue Diamond Ring

Emilio Jewelry Gia Certified Fancy Blue Diamond Ring

By Emilio!

Located in New York, NY

From Emilio Jewelry, a well known and respected wholesaler/dealer located on New York’s iconic Fifth Avenue, Featuring a very special center diamond Gia Certified as Natural 4.00 Ca...

Category

21st Century and Contemporary Three-Stone Rings

Materials

Blue Diamond

GIA 17.91 Carat Old Cushion Cut Diamond Solitaire Ring in Platinum
GIA 17.91 Carat Old Cushion Cut Diamond Solitaire Ring in Platinum

GIA 17.91 Carat Old Cushion Cut Diamond Solitaire Ring in Platinum

Located in La Jolla, CA

GIA certified 17.91 carat Old Cushion Cut Diamond Solitaire Ring in Platinum Old Cushion Diamond Ring features a Center Cushion Brilliant Cut Diamond with beautiful vintage carving ...

Category

20th Century North American Solitaire Rings

Materials

Diamond, Platinum

Art Deco Style Diamond Sapphire Target Platinum Engagement Cocktail Dress Ring
Art Deco Style Diamond Sapphire Target Platinum Engagement Cocktail Dress Ring

Art Deco Style Diamond Sapphire Target Platinum Engagement Cocktail Dress Ring

Located in Lisbon, PT

Art Deco Style diamond and sapphire target stylized engagement or cocktail/dress ring in platinum, 2000s. This ring features a round brilliant-cut diamond millegrain-set to the cente...

Category

Early 2000s Unknown Art Deco Engagement Rings

Materials

Diamond, Sapphire, Platinum

Van Cleef & Arpels Marquise Diamond Platinum Ring GIA 5.11-carat D VVS2 VCA
Van Cleef & Arpels Marquise Diamond Platinum Ring GIA 5.11-carat D VVS2 VCA

Van Cleef & Arpels Marquise Diamond Platinum Ring GIA 5.11-carat D VVS2 VCA

By Van Cleef & Arpels

Located in Beverly Hills, CA

A spectacular platinum ring by Van Cleef & Arpels, featuring a GIA-graded marquise diamond complemented by two baguette diamonds. In addition to the GIA Diamond Grading Report, the r...

Category

1990s French Engagement Rings

Materials

Diamond, Platinum

Issac Nussbaum GIA Certified 18 Carat Oval Diamond H Color VS1 Clarity Ring.
Issac Nussbaum GIA Certified 18 Carat Oval Diamond H Color VS1 Clarity Ring.

Issac Nussbaum GIA Certified 18 Carat Oval Diamond H Color VS1 Clarity Ring.

By Issac Nussbaum

Located in New York, NY

Imagine capturing a moment that lasts a lifetime with this stunning, 18K WG 18 Carat Natural Oval Shape Diamond Ring. The diamond is near colorless,(GIA Certified H color VS1 clari...

Category

2010s Modern Engagement Rings

Materials

Diamond, Platinum

GIA Certified 4 Carat Heart Shape Diamond Ring
GIA Certified 4 Carat Heart Shape Diamond Ring

GIA Certified 4 Carat Heart Shape Diamond Ring

By Antinori Fine Jewels

Located in Chicago, IL

An exquisite three stone diamond ring composed by a main 4 carat heart cut diamond ring vs1 clarity e color

Category

2010s Unknown Contemporary Engagement Rings

Materials

Diamond, White Diamond, Platinum

Owl Black Diamond 18 Karat Gold Australian Pearl Charm or Pendant Necklace
Owl Black Diamond 18 Karat Gold Australian Pearl Charm or Pendant Necklace

Owl Black Diamond 18 Karat Gold Australian Pearl Charm or Pendant Necklace

By Elisa Pozza by PETRONILLA

Located in Bussolengo, Verona

Owl Black Diamond 18Kt Australian Pearl Charm or Pendant Necklace This pearl has a particular shape and I wanted to make a cute little owl. The owl bodes well for students, as in an...

Category

2010s Italian Artisan Charm Bracelets

Materials

Black Diamond, Pearl, Oriental Pearl, Gold, 18k Gold

Diana m Fancy Intense Yellow Diamond Ring 16.30cts
Diana m Fancy Intense Yellow Diamond Ring 16.30cts

Diana m Fancy Intense Yellow Diamond Ring 16.30cts

By Diana M. Jewels

Located in New York, NY

Very Rare 16.30 Carat Fancy Intense Yellow VS2 Oval Diamonds, set with 5 Carats of diamonds Certified by GIA Looks like 25 Carats. Set in a custom made diamond mounting Investment q...

Category

21st Century and Contemporary American Engagement Rings

Materials

Diamond, Yellow Diamond, Platinum

18Kt Gold Hen Pendant/Charm with Australian Pearl and Black Diamonds
18Kt Gold Hen Pendant/Charm with Australian Pearl and Black Diamonds

18Kt Gold Hen Pendant/Charm with Australian Pearl and Black Diamonds

By Elisa Pozza by PETRONILLA

Located in Bussolengo, Verona

After so many accomplished chicks, finally a mother hen. This baroque pearl of 14x20 mm has a protuberance that makes it unique: it reminded me of a hen's tail. Then I made the fea...

Category

2010s Italian Artisan Necklace Enhancers

Materials

Gold, 18k Gold

Pendant/Necklace Puffer Fish White Diamond Blue Sapphire Tahiti Pearl 18Kt Gold
Pendant/Necklace Puffer Fish White Diamond Blue Sapphire Tahiti Pearl 18Kt Gold

Pendant/Necklace Puffer Fish White Diamond Blue Sapphire Tahiti Pearl 18Kt Gold

By Elisa Pozza by PETRONILLA

Located in Bussolengo, Verona

Pendant/Necklace Puffer Fish White Diamond Blue Sapphire Tahiti Pearl 18Kt Gold With a very beautiful spherical Tahiti Pearl (14.00 mm diameter) I created a pendant inspired by the ...

Category

2010s Italian Contemporary Pendant Necklaces

Materials

White Diamond, South Sea Pearl, Blue Sapphire, Pearl, 18k Gold, Gold

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Pentagon Diamond For Sale on 1stDibs

On 1stDibs, you can find the most appropriate pentagon diamond for your needs in our varied inventory. Each design created in this style — which was crafted with great care and often made from Gold, 18k Gold and Platinum — can elevate any look. Our collection of these items for sale includes 10 vintage editions and 7 modern creations to choose from as well. You’re likely to find the perfect pentagon diamond among the distinctive items we have available, which includes versions made as long ago as the 20th Century as well as those produced as recently as the 21st Century. As it relates to this specific piece, our collection includes designs that are universally popular, but 1 Carat and 1.5 Carat carat weights, specifically, are sought with frequency. A pentagon diamond from Roman Malakov, Cartier and Ri Noor — each of whom created a beautiful version of this treasured accessory — is worth considering. Take a look at a pentagon diamond featuring Diamond from our inventory today to add the perfect touch to your look. See these pages for a round cut iteration of this accessory, while there are also mixed cut cut and shield cut cut versions available here, too. When shopping for a pentagon diamond, you’ll find that there are less available pieces for unisex or men today than there are for women.

How Much is a Pentagon Diamond?

Prices for a pentagon diamond can differ depending upon size, time period and other attributes — at 1stDibs, these accessories begin at $650 and can go as high as $54,500, while this accessory, on average, fetches $2,875.

The Legacy of Diamond in Jewelry Design

Antique diamond rings, diamond tiaras and dazzling vintage diamond earrings are on the wish lists of every lover of fine jewelry. And diamonds and diamond jewelry are primarily associated with storybook engagements and red-carpet grand entrances — indeed, this ultra-cherished gemstone has a dramatic history on its hands.

From “A Diamond Is Forever” to “Diamonds Are a Girl’s Best Friend,” pop culture has ingrained in our minds that diamonds are the most desired, the most lasting and the most valuable gemstone. But what makes the diamond so special? Each stone — whether it’s rubies, sapphires or another stone — is unique and important in its own right. April babies might claim diamonds for themselves, but just about everyone wants this kind of sparkle in their lives!

There are several factors that set diamonds apart from other stones, and these points are important to our gem education.

Diamonds are minerals. They are made up of almost entirely of carbon (carbon comprises 99.95 percent; the remainder consists of various trace elements). Diamonds are the hardest gemstones, ranking number 10 on the Mohs Hardness Scale. Even its name, diamond, is rooted in the Greek adamas, or unconquerable. The only object that can scratch a diamond is another diamond. Diamonds are formed deep within the earth at very high temperatures (1,652–2,372 degrees Fahrenheit at depths between 90 and 120 miles beneath the earth’s surface) and are carried up by volcanic activity. Diamonds are quite rare, according to the Gemological Institute of America, and only 30 percent of all the diamonds mined in the world are gem quality.

In the 1950s, the Gemological Institute of America developed the 4Cs grading system to classify diamonds: clarity, color, cut and carat weight. Not all diamonds are created equal (there are diamonds, and then there are diamonds). The value of the diamond depends on the clarity (flawless diamonds are very rare but a diamond's value decreases if there are many blemishes or inclusions), color (the less color the higher the grade), cut (how the diamond’s facets catch the light, certain cuts of diamonds show off the stone better than others) and carat weight (the bigger, the better).

When you start shopping for a diamond engagement ring, always prioritize the cut, which plays the largest role in the diamond's beauty (taking the time to clean your diamond ring at least every six months or so plays a role in maintaining said beauty). And on 1stDibs, a range of buying guides can be found for those in the market for antique engagement ringsvintage engagement rings or Art Deco engagement rings

Shop antique and vintage diamond rings, diamond necklaces and other extraordinary diamond jewelry on 1stDibs.