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Pentagon Diamond

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

. Five brown diamonds are set on the turtle's shell to form an imaginary pentagon. Diamonds are in total

Category

2010s Italian Artisan Pendant Necklaces

Materials

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

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

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

Category

21st Century and Contemporary Cuff Bracelets

Materials

Amethyst, Diamond, Ruby, Palladium

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

Category

21st Century and Contemporary Pendant Necklaces

Materials

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

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

natural diamond (G-H/VS clarity), surrounded by a celestial halo of 0.16ct brilliant-cut diamonds in a

Category

21st Century and Contemporary Hong Kong Modern Pendant Necklaces

Materials

Diamond, 18k Gold

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

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

Located in New York, NY

gold chains are available on our seller page. Diamond Details: 2.31 Natural Black Pentagon Shaped

Category

2010s Indian Pendant Necklaces

Materials

Diamond, Black Diamond, 14k Gold, Yellow Gold

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

Category

20th Century Contemporary Hoop Earrings

Materials

Diamond, 14k Gold, White Gold

0.93CT Natural Brown Diamond Pentagon Choker Necklace in 14 Karat Yellow Gold
0.93CT Natural Brown Diamond Pentagon Choker Necklace in 14 Karat Yellow Gold

0.93CT Natural Brown Diamond Pentagon Choker Necklace in 14 Karat Yellow Gold

Located in New York, NY

natural brown pentagon-shaped diamond, seamlessly integrated into the chain for a clean, elevated

Category

2010s American Choker Necklaces

Materials

Diamond, Brown 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

-work pentagon design. The middle row is set with yellow diamonds weighing 0.22 carat total, and the two

Category

21st Century and Contemporary American Modern Pendant Necklaces

Materials

Diamond, Yellow Diamond, 18k Gold, Platinum, 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

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

: Natural Sapphires & Diamonds Sapphire Carat Weight: 5.33 Carats Sapphire Cut: Pentagon Sapphire Colors

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

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

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

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

, baguette, pentagon, and round-cut diamonds, with the versatile design allowing it to be worn as a single

Category

20th Century Unknown Brooches

Materials

Diamond, Platinum, 14k Gold, White Gold

Yellow and white diamond art deco drop pendant 18k white gold
Yellow and white diamond art deco drop pendant 18k white gold

Yellow and white diamond art deco drop pendant 18k white gold

Located in London, GB

diamond centre trillion pentagon cut modified IGI certified diamond total weight 0.85ct, additional

Category

21st Century and Contemporary British Art Deco Drop Necklaces

Materials

White Diamond, Yellow Diamond, 18k Gold, White 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

raised, box set, square-cut diamonds and pentagonal spatula shaped connections, at either end of each

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

death in 2020 Centre Brilliant Cut Diamond : 13-14 Ct VS1 Diamonds : 45 Baguette, Pentagon, Baguette

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

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

multi color gemstone and diamond frame. These earrings are dainty yet have a great pop of color from the

Category

21st Century and Contemporary Thai Contemporary Drop Earrings

Materials

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

Areza Vintage French Earrings 18k Gold Sapphire Diamond Estate Jewelry
Areza Vintage French Earrings 18k Gold Sapphire Diamond Estate Jewelry

Areza Vintage French Earrings 18k Gold Sapphire Diamond Estate Jewelry

Located in Beverly Hills, CA

in an irregular pentagon shape. The diamonds are four-prong set in two rows around the perimeter. The

Category

Vintage 1980s French Clip-on Earrings

Materials

Diamond, Sapphire, 18k Gold, Yellow Gold

Star Engagement Ring
Star Engagement Ring

Star Engagement Ring

By John Brevard

Located in Coral Gables, FL

pentagon cut diamond will be custom created to your specifications. This piece is currently priced in white

Category

2010s American Modern Engagement Rings

Materials

White Diamond, 18k Gold

Brevard Customizable Star Engagement Ring
Brevard Customizable Star Engagement Ring

Brevard Customizable Star Engagement Ring

By John Brevard

Located in Coral Gables, FL

pentagon cut diamond will be custom created to your specifications. This piece is currently priced in white

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

Diamonds (1.13ct), a pear shaped Diamond (.28ct) and six baguette Diamonds (.16ct.). The pendant is

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

.45 carat total weight of round brilliant cut diamonds and .50 carat total weight of two pentagon

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

and offered with its original presentation box. Decorated with brilliant white diamonds, 2.00 carats

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

-catching amethyst that weighs 13.00 carats and with dazzling diamonds that amount to 0.15 carats. Ring Top

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

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

-catching amethyst that weighs 13.00 carats and with dazzling diamonds that amount to 0.15 carats. Ring Size

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

-catching amethyst that weighs 13.00 carats and with dazzling diamonds that amount to 0.15 carats. Ring Size

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

Category

21st Century and Contemporary Cocktail Rings

Materials

White Diamond, Emerald, Platinum

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

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

Handmade Citrine Necklace. 30ct. Natural Honey color citrine Brilliant Pentagon cut. Clean

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

in elaborate details, these enchanting earrings incorporate  diamond-studded pentagonal, circular and

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

pentagonal settings. The accent diamonds on this antique ring weigh cumulatively 0.4cts and are graded H-I

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

crescent-shaped and diamond-set pentagonal profiles. The artfully caliber-cut vibrant emeralds weigh

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

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

., pentagon cut Tourmaline, a hexagon cut Amethyst and natural coloured purple diamonds 0,61ct.. The natural

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

tapered pentagon shape diamond on the sides. The center diamond comes with a GIA Diamond Grading Report

Category

21st Century and Contemporary American Engagement Rings

Materials

White Diamond, Platinum

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

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

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

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

A stunning, fine and impressive antique 0.66 carat diamond and 0.59 carat emerald, 14 karat yellow

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

cut rubies cap the ends of the brooch bar. There are three pentagonal form baguette cut diamonds the

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

ovalish-round pearl drop with the elegant pentagonal diamond stud top is a magnificent elevated design

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

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

diamonds. The earrings are 1 1/4" at their widest and 1" tall. Omega backs can be converted to clips.

Category

Vintage 1980s Unknown Lever-Back Earrings

Materials

Ruby, 18k Gold

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

Colombian Emerald Diamond Platinum Engagement Ring

Located in Miami, FL

emerald and a duo of brilliant pentagonal-cut diamonds is crafted in solid platinum, weighing 10.7 grams

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

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

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

cut accent diamonds flank and embellish a pair of pentagonal shaped cartouches. Diamond-set hearts

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

beaming between a pair of fancy step-cut pentagonal epaulet diamonds. The scintillating 2.91 carat stone

Category

Vintage 1930s Art Deco Solitaire Rings

Materials

Diamond, White Diamond, Platinum

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By Elisa Pozza by PETRONILLA

Located in Bussolengo, Verona

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2010s Italian Contemporary Pendant Necklaces

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GIA 17.91 Carat Old Cushion Cut Diamond Solitaire Ring in Platinum

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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 ...

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20th Century North American Solitaire Rings

Materials

Diamond, Platinum

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...

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2010s American Artist Solitaire Rings

Materials

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Emilio Jewelry Gia Certified 18.90 Carat Fancy Orange Diamond Ring
Emilio Jewelry Gia Certified 18.90 Carat Fancy Orange Diamond Ring

Emilio Jewelry Gia Certified 18.90 Carat Fancy Orange 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,  Please inquire for more images, certificates, and details. Zoom meetings...

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Magnificent Old European Cut Diamond and Sapphire Ring
Magnificent Old European Cut Diamond and Sapphire Ring

Magnificent Old European Cut Diamond and Sapphire Ring

By Paul Binder

Located in Lucerne, CH

Well played fusion of an antique diamond with a modern design. Binder Zurich is a well know name for collectors all over the world. The 7.21 ct old European cut diamond of approxim...

Category

Early 2000s Swiss Contemporary Cocktail Rings

Materials

Diamond, Sapphire, 18k Gold, Rose 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

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Emilio Jewelry Gia Certified 55.00 Carat Diamond Necklace
Emilio Jewelry Gia Certified 55.00 Carat Diamond Necklace

Emilio Jewelry Gia Certified 55.00 Carat Diamond Necklace

By Emilio!

Located in New York, NY

From the Museum Vault At Emilio Jewelry located on New York's Iconic Fifth Avenue, A magnificent necklace hand made in the Emilio Atelier, the focal point of this necklace is the Cen...

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21st Century and Contemporary Choker Necklaces

Materials

Diamond

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...

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Early 2000s Unknown Art Deco Engagement Rings

Materials

Diamond, Sapphire, Platinum

Emilio Jewelry GIA Certified 7.02 Carat Natural Blue Diamond Ring
Emilio Jewelry GIA Certified 7.02 Carat Natural Blue Diamond Ring

Emilio Jewelry GIA Certified 7.02 Carat Natural Blue Diamond Ring

By Emilio!

Located in New York, NY

From the museum vault at Emilio Jewelry New York, One of the rarest and only diamonds of its size and color. Please inquire for details.

Category

21st Century and Contemporary Three-Stone Rings

Materials

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GIA Certified 6.02 Carat Marquise Shape Fancy Light Yellow Diamond Cocktail Ring
GIA Certified 6.02 Carat Marquise Shape Fancy Light Yellow Diamond Cocktail Ring

GIA Certified 6.02 Carat Marquise Shape Fancy Light Yellow Diamond Cocktail Ring

By Joke Quick

Located in Antwerp, BE

Experience exceptional Belgian high jewellery craftsmanship with this rare, one-of-a-kind ring, designed by jewellery artist Joke Quick. Crafted in 18K yellow and rose gold, the piec...

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2010s Belgian Contemporary Cocktail Rings

Materials

Pink Diamond, Yellow Diamond, Diamond, Yellow Gold, Rose Gold, 18k Gold

Harry Winston 12.00 Carats Pear Shape Diamond Three-Stone Engagement Ring
Harry Winston 12.00 Carats Pear Shape Diamond Three-Stone Engagement Ring

Harry Winston 12.00 Carats Pear Shape Diamond Three-Stone Engagement Ring

By Harry Winston

Located in New York, NY

A classic Harry Winston diamond engagement ring, showcasing a 12.00 carats pear shape diamond certified by GIA as F color and VVS2 clarity, set on a five prong setting. Flanked by ta...

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Late 20th Century American Contemporary Engagement Rings

Materials

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Fancy Green Diamond Cocktail Ring
Fancy Green Diamond Cocktail Ring

Fancy Green Diamond Cocktail Ring

Located in New York, NY

Fancy Green Diamond Cocktail Ring, set in platinum GIA Certified Green pear shape Weight: 2.80 Cts Color: Treated, Fancy deep yellowish green Clarity: SI1 Ring Size: 5.25 Re-sizable...

Category

Vintage 1980s Cocktail Rings

Materials

Diamond, Platinum

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

Harry Winston Platinum 4.05 cts Diamond Ring
Harry Winston Platinum 4.05 cts Diamond Ring

Harry Winston Platinum 4.05 cts Diamond Ring

By Harry Winston

Located in New York, NY

Harry Winston platinum RBC diamond engagement ring with GIA certificate center diamond 4.05 cts E color SI1, with 2 heart shape diamond approx 1.50 cts Marked HW PT 950 4.05 ring siz...

Category

21st Century and Contemporary Modern Engagement Rings

Materials

Diamond, Platinum

Emilio Jewelry GIA Certified 1.00 Carat Vivid Pure Green Diamond
Emilio Jewelry GIA Certified 1.00 Carat Vivid Pure Green Diamond

Emilio Jewelry GIA Certified 1.00 Carat Vivid Pure Green Diamond

By Emilio!

Located in New York, NY

From Emilio Jewelry, a well known and respected wholesaler/dealer located in the Iconic Gem Tower/Gia Building in New York's Diamond District. We are pleased to present the only Gia ...

Category

21st Century and Contemporary Three-Stone Rings

Materials

Diamond

NWT $335, 000 18KT Rare Exquisite Massive Fancy Glittering Paraiba Diamond Ring
NWT $335, 000 18KT Rare Exquisite Massive Fancy Glittering Paraiba Diamond Ring

NWT $335, 000 18KT Rare Exquisite Massive Fancy Glittering Paraiba Diamond Ring

Located in New York, NY

The Following Items we are offering is a Rare Important Spectacular and Brilliant 18KT Gold Large Massive Gorgeous Paraiba and Diamond Ring. Ring consists of Rare a Large Fine Magnif...

Category

21st Century and Contemporary Cocktail Rings

Materials

Diamond, Paraiba, Gold, 18k 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.