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Antique 18K White Gold Rectangular Black Onyx Circular Diamond Cocktail Ring
Antique 18K White Gold Rectangular Black Onyx Circular Diamond Cocktail Ring

Antique 18K White Gold Rectangular Black Onyx Circular Diamond Cocktail Ring

Located in Houston, TX

brilliant cut natural diamond: Measurements: 2.67mm - 2.70mm in diameter x ~1.64mm in depth. Estimated

Category

Early 20th Century Unknown Cocktail Rings

Materials

Diamond, Onyx, Gold, 18k Gold, White Gold

Antique 15ct Yellow Gold, Edwardian era Circular Shaped Diamond Flower Pendant
Antique 15ct Yellow Gold, Edwardian era Circular Shaped Diamond Flower Pendant

Antique 15ct Yellow Gold, Edwardian era Circular Shaped Diamond Flower Pendant

Located in Brighton, GB

and a lovely tactile quality. At the heart of the pendant lies a brilliant bezel-set diamond, which

Category

Early 20th Century English Edwardian Pendant Necklaces

Materials

Diamond, 15k Gold, Yellow Gold

18K WG Cluster Earrings with 2 Ct Circular Diamonds 1.3 Ct Sapphire and Coral
18K WG Cluster Earrings with 2 Ct Circular Diamonds 1.3 Ct Sapphire and Coral

18K WG Cluster Earrings with 2 Ct Circular Diamonds 1.3 Ct Sapphire and Coral

Located in New York, NY

arrangement of gemstones, including 2 carats of H color, Si clarity diamonds in a circular brilliant cut, and

Category

20th Century Drop Earrings

Materials

Coral, Diamond, Sapphire, 18k Gold, White Gold

Solid 14k White Gold 1.2ctw Round Cut Diamond Cluster Triple Circular Band Ring
Solid 14k White Gold 1.2ctw Round Cut Diamond Cluster Triple Circular Band Ring

Solid 14k White Gold 1.2ctw Round Cut Diamond Cluster Triple Circular Band Ring

Located in Montclair, NJ

–Stone(s): – (52) Natural Genuine Diamonds - Round Brilliant Cut - Prong Set - G/H Color - VS1-SI1

Category

21st Century and Contemporary Cluster Rings

Materials

Diamond, Gold, 14k Gold, White Gold

Cartier 18K Tri-Gold Round-Cut Pave Diamond Trinity Circular Pendant Necklace
Cartier 18K Tri-Gold Round-Cut Pave Diamond Trinity Circular Pendant Necklace

Cartier 18K Tri-Gold Round-Cut Pave Diamond Trinity Circular Pendant Necklace

By Cartier

Located in Aventura, FL

) Pendant Style: Trinity Circular Pendant Necklace Design: Intertwined Design Diamonds: Round-Cut Pavé-Set

Category

21st Century and Contemporary American Modernist Pendant Necklaces

Materials

Diamond, Gold, 18k Gold, White Gold, Rose Gold, Yellow Gold

Pave Circular Cube 8K Gold and Oxidised Silver Ring with Champagne Diamonds
Pave Circular Cube 8K Gold and Oxidised Silver Ring with Champagne Diamonds

Pave Circular Cube 8K Gold and Oxidised Silver Ring with Champagne Diamonds

By Emre Osmanlar

Located in ISTANBUL, TR

‘Cubicist’ is a bold vision of contemporary, industrial design that is edgy, elegant and luxurious. Here, Emre stages a meeting of contrasts to create jewellery that are as modern an...

Category

2010s Turkish Contemporary Fashion Rings

Materials

Diamond, Gold, Silver

Pave Circular Cube 8k Gold and Oxidised Silver Ring with Black Diamonds
Pave Circular Cube 8k Gold and Oxidised Silver Ring with Black Diamonds

Pave Circular Cube 8k Gold and Oxidised Silver Ring with Black Diamonds

By Emre Osmanlar

Located in ISTANBUL, TR

‘Cubicist’ is a bold vision of contemporary, industrial design that is edgy, elegant and luxurious. Here, Emre stages a meeting of contrasts to create jewellery that are as modern an...

Category

2010s Turkish Contemporary Fashion Rings

Materials

Black Diamond, Gold, Silver

2.75ct Art Deco Platinum Bracelet with Rose Cut & Brilliant Diamonds
2.75ct Art Deco Platinum Bracelet with Rose Cut & Brilliant Diamonds

2.75ct Art Deco Platinum Bracelet with Rose Cut & Brilliant Diamonds

Located in New York, NY

openwork geometric design, richly set with both rose-cut and circular brilliant-cut diamonds totaling 2.75

Category

20th Century Art Deco Link Bracelets

Materials

Diamond, Platinum

14k Yellow Gold 1.00ctw Natural Round Brilliant Diamond Oval Link Paperclip
14k Yellow Gold 1.00ctw Natural Round Brilliant Diamond Oval Link Paperclip

14k Yellow Gold 1.00ctw Natural Round Brilliant Diamond Oval Link Paperclip

Located in Boca Raton, FL

14k Yellow Gold 1.00ctw Natural Round Brilliant Diamond Circle Center Attached to a Large Oval Link

Category

21st Century and Contemporary American Pendant Necklaces

Materials

Diamond, Gold, 14k Gold, Yellow Gold

4.07 Carat Natural Round Brilliant In/Out Diamond Hoop Earrings 14 Karat
4.07 Carat Natural Round Brilliant In/Out Diamond Hoop Earrings 14 Karat

4.07 Carat Natural Round Brilliant In/Out Diamond Hoop Earrings 14 Karat

Located in New York, NY

Large size / Modern, In & Out. Circular & wide 4.07ct. Natural Round, Brilliant diamonds hoop

Category

2010s American Hoop Earrings

Materials

Diamond, 14k Gold, White Gold

Tiffany & Co 1.27 Carat F VS1 Diamond Platinum Engagement Ring GIA
Tiffany & Co 1.27 Carat F VS1 Diamond Platinum Engagement Ring GIA

Tiffany & Co 1.27 Carat F VS1 Diamond Platinum Engagement Ring GIA

By Tiffany & Co.

Located in New York, NY

1.27 carat Circular Brilliant Cut diamond, graded F color and VS1 clarity, and accompanied by GIA

Category

20th Century Engagement Rings

Materials

Diamond, Platinum

Tiffany & Co 1.19 Carat E VS2 Diamond Platinum Engagement Ring Vintage
Tiffany & Co 1.19 Carat E VS2 Diamond Platinum Engagement Ring Vintage

Tiffany & Co 1.19 Carat E VS2 Diamond Platinum Engagement Ring Vintage

By Tiffany & Co.

Located in New York, NY

timeless platinum and features a stunning 1.19 carat circular brilliant cut diamond of exceptional quality

Category

20th Century Engagement Rings

Materials

Diamond, Platinum

18K Gold Platinum Diamond Solitaire Ring, GIA
18K Gold Platinum Diamond Solitaire Ring, GIA

18K Gold Platinum Diamond Solitaire Ring, GIA

Located in Queens, NY

2025, featuring one platinum prong set circular brilliant cut diamond weighing 1.26 carats, E color

Category

Late 20th Century Modern Solitaire Rings

Materials

Diamond, 18k Gold, Yellow Gold, Platinum

Chalcedony-Pearls ca. 12.1 - 12.3 mm 6.50 Carat Diamonds White Gold Necklace
Chalcedony-Pearls ca. 12.1 - 12.3 mm 6.50 Carat Diamonds White Gold Necklace

Chalcedony-Pearls ca. 12.1 - 12.3 mm 6.50 Carat Diamonds White Gold Necklace

By Schreiner Jewelry

Located in Berlin, DE

, captivating hue. Between the pearls, sparkling circular elements - set with brilliant-cut diamonds - create

Category

2010s German Modern Beaded Necklaces

Materials

Chalcedony, Diamond, White Gold

1.50ct L SI1 Round Diamond 18K Gold & Platinum Vintage Engagement Ring
1.50ct L SI1 Round Diamond 18K Gold & Platinum Vintage Engagement Ring

1.50ct L SI1 Round Diamond 18K Gold & Platinum Vintage Engagement Ring

Located in New York, NY

Title: This timeless vintage engagement ring features a striking 1.50 carat circular brilliant cut

Category

20th Century Engagement Rings

Materials

Diamond, 18k Gold, Platinum

Art Deco GIA Certified Diamond and Blue Sapphire Engagement Ring
Art Deco GIA Certified Diamond and Blue Sapphire Engagement Ring

Art Deco GIA Certified Diamond and Blue Sapphire Engagement Ring

Located in Denver, CO

A circular brilliant-cut diamond, certified by the Gemological Institute of America (GIA

Category

Mid-20th Century American Art Deco Engagement Rings

Materials

Diamond, Blue Sapphire, Platinum

18K Art Deco .41ct Diamond Filigree Ring with GIA Report
18K Art Deco .41ct Diamond Filigree Ring with GIA Report

18K Art Deco .41ct Diamond Filigree Ring with GIA Report

Located in Big Bend, WI

Art Deco 18K white gold filigree .41ct diamond ring. The GIA report #2231041985 states circular

Category

Vintage 1920s Art Deco Engagement Rings

Materials

Diamond, Gold, 18k Gold, White Gold

Neil Lane Platinum Diamond Dangle Earrings
Neil Lane Platinum Diamond Dangle Earrings

Neil Lane Platinum Diamond Dangle Earrings

By Neil Lane

Located in Chicago, IL

platinum. These elegant earrings feature a sophisticated circular motif set with brilliant diamonds

Category

1990s American Dangle Earrings

Materials

Diamond, White Diamond, Platinum

Antique Art Deco White Gold GIA Dual Diamond & Sapphire Moi et Toi Engraved Ring
Antique Art Deco White Gold GIA Dual Diamond & Sapphire Moi et Toi Engraved Ring

Antique Art Deco White Gold GIA Dual Diamond & Sapphire Moi et Toi Engraved Ring

Located in Montclair, NJ

Diamond - Circular Brilliant Old Cut - Prong Set - I Color - VS2 Clarity - 0.30ct (approx.) (2) Synthetic

Category

Vintage 1930s Art Deco Cocktail Rings

Materials

Diamond, Sapphire, 14k Gold, White Gold

Vintage Heart Themed Diamond Eternity Band
Vintage Heart Themed Diamond Eternity Band

Vintage Heart Themed Diamond Eternity Band

Located in Webster, NY

, Circular Brilliant Cut Total Diamond Carat Weight: 0.85CTW Average Diamond Color: F-H Average Diamond

Category

20th Century Band Rings

Materials

Diamond, Platinum

Platinum 8.26 Carat Diamond Link Necklace Bracelet with Emerald Cut Center
Platinum 8.26 Carat Diamond Link Necklace Bracelet with Emerald Cut Center

Platinum 8.26 Carat Diamond Link Necklace Bracelet with Emerald Cut Center

Located in New York, NY

. Surrounding the centerpiece are 259 circular brilliant-cut diamonds, along with baguette and marquise accents

Category

20th Century Link Necklaces

Materials

Diamond, Platinum

GIA Certified 3.25 Carat Old European Cut Natural Diamond K VS2
GIA Certified 3.25 Carat Old European Cut Natural Diamond K VS2

GIA Certified 3.25 Carat Old European Cut Natural Diamond K VS2

Located in Los Angeles, CA

- Good Fluorescence - Faint GIA Report Number - 5231796914 Natural Diamond Circular Brilliant 3.25 Carat

Category

21st Century and Contemporary American Art Deco Loose Gemstones

Materials

Diamond

Impressive GIA 2.01ct Diamond Sapphire Halo Ring
Impressive GIA 2.01ct Diamond Sapphire Halo Ring

Impressive GIA 2.01ct Diamond Sapphire Halo Ring

Located in New York, NY

Made of platinum, this ring centers a sparkling GIA certified circular brilliant cut diamond that

Category

20th Century Engagement Rings

Materials

Diamond, Sapphire, Platinum

Amazing 2.05 Carat Diamond Platinum Engagement Ring
Amazing 2.05 Carat Diamond Platinum Engagement Ring

Amazing 2.05 Carat Diamond Platinum Engagement Ring

Located in New York, NY

circular brilliant cut diamond that weighs 2.05ct. graded G color with VS1 clarity. The top of the ring

Category

Early 20th Century Edwardian Engagement Rings

Materials

Diamond, Platinum

Vintage 1.70 Carat Old European Cut Diamond Platinum Engagement Ring
Vintage 1.70 Carat Old European Cut Diamond Platinum Engagement Ring

Vintage 1.70 Carat Old European Cut Diamond Platinum Engagement Ring

Located in Chicago, IL

stone is a natural Old European / circular brilliant cut diamond weighing 1.44 carats, graded J color

Category

Vintage 1940s American Art Deco Engagement Rings

Materials

Diamond, White Diamond, Platinum

2.05 Carat GIA Cert Diamond Platinum Engagement Ring
2.05 Carat GIA Cert Diamond Platinum Engagement Ring

2.05 Carat GIA Cert Diamond Platinum Engagement Ring

Located in New York, NY

brilliant cut diamond that weighs 2.05ct. graded I color with VS1 clarity. The center stone is accentuated

Category

Early 20th Century Engagement Rings

Materials

Diamond, Platinum

1.03 Carat GIA Cert Diamond Platinum Engagement Ring
1.03 Carat GIA Cert Diamond Platinum Engagement Ring

1.03 Carat GIA Cert Diamond Platinum Engagement Ring

Located in New York, NY

brilliant cut diamond that weighs 1.03ct. graded J color with SI1 clarity. Accentuating the center stone are

Category

20th Century Edwardian Engagement Rings

Materials

Diamond, Platinum

GIA Certified .87 Carat Diamond Platinum Engagement Ring
GIA Certified .87 Carat Diamond Platinum Engagement Ring

GIA Certified .87 Carat Diamond Platinum Engagement Ring

Located in Stamford, CT

circular brilliant cut diamond, I2 approx. .87cts GIA Certificate # 1216825492 Size 6.5 and sizable

Category

Early 20th Century Engagement Rings

Materials

Diamond, Platinum

Van Cleef & Arpels Diamond 18 Karat Yellow Gold Bouttoniere Pendant Necklace
Van Cleef & Arpels Diamond 18 Karat Yellow Gold Bouttoniere Pendant Necklace

Van Cleef & Arpels Diamond 18 Karat Yellow Gold Bouttoniere Pendant Necklace

By Van Cleef & Arpels

Located in Boca Raton, FL

pendant necklace features a refined circular motif accented with brilliant diamonds, embodying the

Category

21st Century and Contemporary French Modern Pendant Necklaces

Materials

Diamond, Gold, 18k Gold, Yellow Gold

Vintage Platinum 1950s 1.31 Carat Round Diamond Ring
Vintage Platinum 1950s 1.31 Carat Round Diamond Ring

Vintage Platinum 1950s 1.31 Carat Round Diamond Ring

Located in Boston, MA

Vintage Platinum 1950s 1.31ct Round Diamond Ring - Center circular brilliant transitional cut

Category

Mid-20th Century American Retro Engagement Rings

Materials

Diamond, Platinum

18K Two-Tone Gold Dragon Brooch with Diamonds and Emerald Eyes Vintage
18K Two-Tone Gold Dragon Brooch with Diamonds and Emerald Eyes Vintage

18K Two-Tone Gold Dragon Brooch with Diamonds and Emerald Eyes Vintage

Located in New York, NY

beard and mane are about 1.50 carats of circular brilliant-cut diamonds graded I color and SI clarity

Category

20th Century Brooches

Materials

Diamond, Emerald, 18k Gold

1.01 Carat GIA Cert Diamond Platinum Cluster Ring
1.01 Carat GIA Cert Diamond Platinum Cluster Ring

1.01 Carat GIA Cert Diamond Platinum Cluster Ring

Located in New York, NY

brilliant cut diamond that weighs 1.01ct. graded I color with VS1 clarity. Accentuating the center stone are

Category

Late 20th Century Art Deco Engagement Rings

Materials

Diamond, Platinum

Edwardian 1.38 Carat GIA Cert Diamond Platinum Engagement Ring
Edwardian 1.38 Carat GIA Cert Diamond Platinum Engagement Ring

Edwardian 1.38 Carat GIA Cert Diamond Platinum Engagement Ring

Located in New York, NY

certified circular brilliant cut diamond that weighs 1.38ct. and is graded K color with SI1 clarity. The

Category

Early 20th Century Edwardian Engagement Rings

Materials

Diamond, Platinum

Antique 0.93 Carat GIA Cert Diamond Platinum Engagement Ring
Antique 0.93 Carat GIA Cert Diamond Platinum Engagement Ring

Antique 0.93 Carat GIA Cert Diamond Platinum Engagement Ring

Located in New York, NY

brilliant cut diamond that weighs 0.93ct. graded J color with VS2 clarity. The center diamond is accentuated

Category

Early 20th Century Art Deco Engagement Rings

Materials

Diamond, Platinum

Peter Suchy GIA Certified 3.37 Carat Diamond Platinum Engagement Ring
Peter Suchy GIA Certified 3.37 Carat Diamond Platinum Engagement Ring

Peter Suchy GIA Certified 3.37 Carat Diamond Platinum Engagement Ring

By Peter Suchy

Located in Stamford, CT

platinum setting with 20 round diamonds along the shank. Extra sparkly circular brilliant cut diamond

Category

21st Century and Contemporary Engagement Rings

Materials

Diamond, Platinum

GIA 1.25 carat I/SI1 Diamond Sapphire Engagement Ring
GIA 1.25 carat I/SI1 Diamond Sapphire Engagement Ring

GIA 1.25 carat I/SI1 Diamond Sapphire Engagement Ring

Located in San Francisco, CA

GIA 1.25-carats I/SI1 circular round brilliant-cut diamond, and accented with 2 square-cut sapphires

Category

21st Century and Contemporary Art Deco Engagement Rings

Materials

Diamond, Blue Sapphire, Platinum

Art Deco GIA 1.37 carat old European cut diamond platinum engagement ring
Art Deco GIA 1.37 carat old European cut diamond platinum engagement ring

Art Deco GIA 1.37 carat old European cut diamond platinum engagement ring

Located in Beverly Hills, CA

Center stone: Circular brilliant cut diamond Weight: 1.37 carats Color: E Clarity: SI1 Accent stone: 14

Category

Vintage 1930s Art Deco Engagement Rings

Materials

Diamond, Platinum

Piaget Ref. 9706 A6 24mm Jade Dial Diamond Emerald 18K Bracelet Watch
Piaget Ref. 9706 A6 24mm Jade Dial Diamond Emerald 18K Bracelet Watch

Piaget Ref. 9706 A6 24mm Jade Dial Diamond Emerald 18K Bracelet Watch

By Piaget

Located in Miami, FL

24mm circular case set with brilliant round diamonds and emerald bezel, Jade dial, complemented by gold

Category

Vintage 1980s Swiss Retro Wrist Watches

Materials

Diamond, Emerald, Jade, 18k Gold

Art Deco Pink Tourmaline Taper Baguette Diamond Circle Gold Pendant Necklace
Art Deco Pink Tourmaline Taper Baguette Diamond Circle Gold Pendant Necklace

Art Deco Pink Tourmaline Taper Baguette Diamond Circle Gold Pendant Necklace

By Vaibhav Dhadda

Located in Jaipur, Rajasthan

circularly complimented with brilliant cut diamonds. Skillfully crafted, this pendant features ombre shades

Category

21st Century and Contemporary Indian Art Deco Pendant Necklaces

Materials

Diamond, Tourmaline, Yellow Gold, Gold, 14k Gold

Mid-Century Modern 14K White & Yellow Gold, Diamond, & Pearl Floral Brooch
Mid-Century Modern 14K White & Yellow Gold, Diamond, & Pearl Floral Brooch

Mid-Century Modern 14K White & Yellow Gold, Diamond, & Pearl Floral Brooch

Located in Philadelphia, PA

European cut diamonds: 4-7 - 4.9mm± = 0.90± Ctw 155 circular round brilliant & Old European cut diamonds

Category

Mid-20th Century Unknown Modern Brooches

Materials

Diamond, Pearl, Yellow Gold

3.51 Carat Old European Cut Diamond 0.60 Carat Emerald 18K Gold-Plat Earrings
3.51 Carat Old European Cut Diamond 0.60 Carat Emerald 18K Gold-Plat Earrings

3.51 Carat Old European Cut Diamond 0.60 Carat Emerald 18K Gold-Plat Earrings

Located in New York, NY

Title: 3.51 Carat Old European Cut J-K I1 and Circular Brilliant Cut J I1 Diamond 0.60 Carat

Category

20th Century Drop Earrings

Materials

Diamond, Emerald, 18k Gold, Platinum

Exceptional 2.78ct Old Euro 18k White Gold Diamond Ring
Exceptional 2.78ct Old Euro 18k White Gold Diamond Ring

Exceptional 2.78ct Old Euro 18k White Gold Diamond Ring

Located in San Francisco, CA

European Cut Diamond (Circular Brilliant), expertly set with 10 delicate prongs in an 18 karat white gold

Category

21st Century and Contemporary American Art Deco Engagement Rings

Materials

Diamond, 18k Gold, White Gold

Marcus & Co. GIA 6.35 Carat Diamond Platinum Three-Stone Engagement Ring
Marcus & Co. GIA 6.35 Carat Diamond Platinum Three-Stone Engagement Ring

Marcus & Co. GIA 6.35 Carat Diamond Platinum Three-Stone Engagement Ring

By Marcus & Co.

Located in Stamford, CT

#2151145058 1 circular brilliant cut diamond, approx. total weight 1.74cts, J, VS2, Depth: 65.3% Table: 53

Category

Early 20th Century Unknown Three-Stone Rings

Materials

Diamond, Platinum

Onyx and Diamond Art Deco Style Circle Arrow Brooch in 14K White Gold
Onyx and Diamond Art Deco Style Circle Arrow Brooch in 14K White Gold

Onyx and Diamond Art Deco Style Circle Arrow Brooch in 14K White Gold

Located in Bangkok, TH

design. Deep black onyx forms a dramatic circular backdrop, beautifully contrasted by brilliant diamonds

Category

21st Century and Contemporary Thai Art Deco Brooches

Materials

Diamond, Onyx, White Gold, 14k Gold

Pink Tourmaline Taper Baguettes Diamond Circle Dangle Art Deco Gold Earrings
Pink Tourmaline Taper Baguettes Diamond Circle Dangle Art Deco Gold Earrings

Pink Tourmaline Taper Baguettes Diamond Circle Dangle Art Deco Gold Earrings

By Vaibhav Dhadda

Located in Jaipur, Rajasthan

pink tourmalines are circularly complimented with brilliant cut diamonds. Skillfully crafted, these

Category

21st Century and Contemporary Indian Art Deco Dangle Earrings

Materials

Diamond, Tourmaline, Yellow Gold, Gold, 14k Gold

1950s Ceylon Natural Sapphire Diamond Cluster Drop Earrings Platinum White Gold.
1950s Ceylon Natural Sapphire Diamond Cluster Drop Earrings Platinum White Gold.

1950s Ceylon Natural Sapphire Diamond Cluster Drop Earrings Platinum White Gold.

Located in Lisbon, PT

. Each earring is designed as a circular sapphire and round brilliant-cut diamond cluster surmount

Category

Vintage 1950s Portuguese Modern Drop Earrings

Materials

Diamond, Blue Sapphire, Gold, 18k Gold, White Gold, Platinum

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Circular Brilliant Diamond For Sale on 1stDibs

Surely you’ll find the exact circular brilliant diamond you’re seeking on 1stDibs — we’ve got a vast assortment for sale. Every item for sale was constructed with extraordinary care, often using Gold, 18k Gold and Yellow Gold. Find an antique version now, or shop for 20 vintage or 7 modern creation for a more contemporary example of these cherished accessories. Finding the perfect circular brilliant diamond may mean sifting through those created during different time periods — you can find an early version that dates to the 19th Century and a newer variation that were made as recently as the 21st Century. As it relates to this specific piece, our collection includes designs that are universally popular, but 1.5 Carat and 2 Carat carat weights, specifically, are sought with frequency. Creating a circular brilliant diamond has been a part of the legacy of many jewelers, but those produced by Emre Osmanlar, Jabel and Roman Malakov are consistently popular. See these pages for a brilliant cut iteration of this accessory, while there are also round cut cut and rose cut cut versions available here, too. If you’re browsing our inventory for a circular brilliant diamond, you’ll find that many are available today for women, but there are still pieces to choose from for unisex and men.

How Much is a Circular Brilliant Diamond?

On average, a circular brilliant diamond at 1stDibs sells for $6,225, while they’re typically $1,350 on the low end and $39,000 for the highest priced versions of this item.

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.