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Diamond Rings

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5.93 Carat Cushion Cut Diamond Set in a Handcrafted Yellow Gold Engagement Ring
Located in Los Angeles, CA
5.93ctw O-P/SI1 GIA certified Cushion cut diamond with 0.19ctw old European cut accent diamonds set in a handcrafted 18K yellow gold mounting. Ring is currently a size 6 and can be ...
Category

21st Century and Contemporary Diamond Rings

Materials

Diamond, Gold, 18k Gold, Yellow Gold

Untreated Sapphire Ring, 9.68 Carats
Located in New Orleans, LA
Weighing a monumental 9.68 carats, this sapphire exhibits the perfect royal blue hue, the color most desired in these gems. The sapphire has been independently certified by four majo...
Category

21st Century and Contemporary Modern Diamond Rings

Materials

Diamond, White Diamond, Sapphire, Blue Sapphire, Platinum

GIA Certified 27.9 Ct Paraiba Tourmaline Diamond White Gold Cocktail Ring
Located in Territet, CH
Incredible and unique GIA Certified 27,9 Carat Paraiba Tourmaline Diamond White Gold Cocktail Ring made by swiss jewellers. Impeccable finishing, 10 baguette cut diamonds IF qual...
Category

2010s Neoclassical Diamond Rings

Materials

Diamond, Tourmaline, Paraiba, White Gold

David Rosenberg 17.32 Carat Oval Fancy Yellow GIA Diamond Engagement Ring
Located in Boca Raton, FL
Rosenberg Diamonds & Co. 17.32 Oval shape Fancy Yellow SI2 Clarity is accompanied by a GIA certificate. This gorgeous Oval is full of life and is an exceptional SI2 that is set in a ...
Category

21st Century and Contemporary Modern Diamond Rings

Materials

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

GIA Certified 3.17ct Oval Cut Green Emerald and Diamond Ring
Located in Calabasas, CA
This 3.17ct Oval Cut Green Emerald is set in 18K white Gold surrounded by 122pcs Round G-VS =0.55cttw GIA certified #5121892595
Category

2010s Modern Diamond Rings

Materials

Diamond, Emerald, 18k Gold

Flawless GIA Certified 5.75 Carat Emerald Cut Diamond Platinum Ring
Located in Rome, IT
Antinori Fine Jewels is proud to offer this important and impressive 5.75 carat GIA certified D Color FLAWLESS Clarity Emerald cut diamond ring. The ring consists of one emerald cu...
Category

2010s Modern Diamond Rings

Materials

Diamond, White Diamond, Emerald, Platinum

Amedeo "Lion King" Cameo Ring with White Diamonds
Located in New York, NY
25mm sardonyx shell cameo hand-carved, set on 18kt and sterling silver black rhodium plated with 0.30cts of white diamonds and 0.10cts of rose cut white diamonds
Category

2010s Artisan Diamond Rings

Materials

White Diamond, 18k Gold, Yellow Gold, Sterling Silver

8.49 Carat Aquamarine & Diamond Platinum Ring
Located in QLD , AU
It's hard to beat a stunning cocktail ring, especially when it showcases an 8.49ct perfect blue Aquamarine sprinkled with some diamonds. This newly crafted ring is designed in the Ar...
Category

21st Century and Contemporary Art Deco Diamond Rings

Materials

Aquamarine, Diamond, Platinum

10.31 Carat Green Tourmaline and Diamond Yellow Gold Engraved Dome Ring
Located in Los Angeles, CA
A vibrant, rich green 10.31 carat tourmaline oval is featured in this gorgeous, custom-designed 18k yellow gold ring. The tourmaline is a gem in every respect, possessing exceptiona...
Category

21st Century and Contemporary Artisan Diamond Rings

Materials

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

Cartier 18 Karat Yellow Gold Diamond Panther Wrap Lakarda Ring
Located in New York, NY
A stunning vintage Carter panther Lakarda ring that features pave diamonds weighing approximately 6.5 carats. This ring has a spring mechanism that makes this ring more flexible and ...
Category

20th Century Modern Diamond Rings

Materials

Diamond, Yellow Gold

Bulgari Diamond 3-Row Flexible Yellow Gold Ring
Located in New York, NY
This gorgeous Bvlgari ring features 3 flexible rows crafted in 18k yellow gold and set with set with round brilliant F-G VVS2-VS1 diamonds weighing an estimated 1.60 - 1.70 carats. M...
Category

1990s Diamond Rings

Materials

Diamond, Yellow Gold

Emilio Jewelry GIA Certified 3.00 Carat Pure Light Pink Diamond
Located in New York, NY
From The Museum Vault At Emilio Jewelry New York, Main stone: 3.00 carat Very Light Pink VVS1 CUSHION Setting: 8 fancy-cut white diamonds totaling approximately 3.26 carats, white d...
Category

21st Century and Contemporary Diamond Rings

Materials

Pink Diamond

Vivid Diamonds GIA Certified 5.93 Carat Pear Shape Diamond Engagement Ring
Located in Miami, FL
Sensational Vivid Diamonds engagement ring crafted in platinum, showcasing a spectacular GIA certified pear shape diamond weighing 5.93 carats, J color, SI1 clarity, adorned with two...
Category

21st Century and Contemporary Modern Diamond Rings

Materials

Diamond, Platinum

Vivid Diamonds GIA Certified 8.63 Carat Emerald Cut Diamond Eternity Band
Located in Miami, FL
Vivid Diamonds eternity band crafted by hand in platinum, showcasing 17 spectacular GIA certified emerald cut diamonds weighing 8.63 carats total, D-E color, VVS1- VS1 clarity. Each ...
Category

21st Century and Contemporary Modern Diamond Rings

Materials

Diamond, Platinum

Pear Shaped Cabochon Burma Rubies and Diamond Split Shank Gold Cocktail Ring
Located in New York, NY
14 karats white and yellow gold split shank facing cabochon Burma ruby and diamond cocktail ring Pear shape cabochon Burma ruby weighing 2.72 carat One Diamond bezel set weighing 0...
Category

2010s Contemporary Diamond Rings

Materials

Ruby, Diamond, Gold, 14k Gold, White Gold

David Rosenberg 10.12 Carat Cushion Cut GIA Three Stone Diamond Engagement Ring
Located in Boca Raton, FL
Rosenberg Diamonds & Co. 10.12 carat Cushion Cut H color SI1 clarity is accompanied by a GIA certificate. This spectacular Cushion is full of brilliance and it is set in a handmade p...
Category

21st Century and Contemporary Modern Diamond Rings

Materials

Diamond, White Diamond, Platinum

Cartier Le Baiser Du Dragon Black Jade Diamond White Gold Ring
Located in New York, NY
This spectacular ring from Cartier's iconic Le Baiser du Dragon is inspired by gorgeous East Asian design elements, crafted in 18k white gold, set with a cushion-cut black jade and a...
Category

Early 2000s Diamond Rings

Materials

Diamond, Black Jade, White Gold

Bulgari Spiga Diamond White Gold Flexible 2-Row Snake Ring
Located in New York, NY
This fabulous Bvlgari Snake ring from the iconic Spiga collection is crafted in 18k white gold and set with round brilliant F-G-H VVS1-VVS2 diamonds weighing an estimated 0.75 carats...
Category

1990s Diamond Rings

Materials

Diamond, White Gold

GIA 4.96ct Old Mine Cut Engagement Ring Solitaire Jack Weir and Sons
Located in Beverly Hills, CA
Jack Weir and Sons GIA 4.96 carat Old Mine Cut Solitaire Engagement Ring. The center diamond is GIA certified Old Mine Cut, 4.96 carat, O-P color, SI2 clarity (#2211684722). Circa 20...
Category

2010s Contemporary Diamond Rings

Materials

Diamond, 18k Gold

Van Cleef & Arpels Diamond, Yellow Sapphire Ring
Located in New York, NY
VAN CLEEF & ARPELS Diamond, Yellow Sapphire Ring An 18k yellow gold ring, set with diamonds and Ceylon no heat yellow sapphire, signed Van Cleef & Arpels, circa 1980s. This comes wit...
Category

1980s Vintage Diamond Rings

Materials

Diamond, Yellow Sapphire, 18k Gold

Amedeo "Pirate" Cameo Ring with Black Diamonds
Located in New York, NY
25mm sardonyx shell cameo hand-carved set on 18kt and sterling silver black, rhodium plated with 0.58cts of black diamonds.
Category

2010s Artisan Diamond Rings

Materials

Black Diamond, 18k Gold, Yellow Gold, Sterling Silver

5.35 Carats Blue Opal Pink Sapphire Blue Sapphire And Diamonds 18kt Gold Ring
Located in Jaipur, Jaipur
This collection features only high jewellery pieces, with bright, rich gemstones whose hues are juxtaposed with one another. With this 5.35 carats doublet blue opal cocooned in pave ...
Category

21st Century and Contemporary Modern Diamond Rings

Materials

Diamond, White Diamond, Opal, Blue Sapphire, Pink Sapphire, Gold, 18k Go...

GIA Certified Pinkish Purple Oval Cut Diamond Halo Engagement Ring
Located in New York, NY
Features a rare 0.63 carat oval cut diamond certified by GIA as Fancy Light Pinkish Purple color, VS2 clarity. Surrounding the center are two rows of round brilliant diamonds set in ...
Category

21st Century and Contemporary Contemporary Diamond Rings

Materials

Diamond, Pink Diamond, Platinum

Gold Rubelite and 1.50 Carats Diamonds French Vintage Ring
Located in Saint-Ouen, FR
Very beautiful ring, made in France circa 1980. Made in yellow gold 18k, hallmark for gold: the eagle head. Mark of maker (Unknown). The ring is set with a big Rubelite in the center...
Category

1980s Vintage Diamond Rings

Materials

Diamond, Rubelite, Gold, 18k Gold

Alex Soldier Diamond Sapphire Ruby Garnet Citrine Sunny the Snail Ring
Located in New York, NY
Alex Soldier uses snails as a reminder to slow down and enjoy life. He has created more than 25 jewel encrusted snails, each unique and one-of-a-kind. It became an instant classic an...
Category

2010s Contemporary Diamond Rings

Materials

Citrine, Diamond, White Diamond, Garnet, Ruby, Sapphire, Yellow Sapphire...

Late Victorian Emerald and Old Cut Diamond 18ct Gold Cluster Ring, Circa 1890
Located in London, GB
Natural emerald and diamond cluster ring featuring an oval shaped vibrant emerald in the center mounted an open back claw setting with an approximate weight of 1.00 carat. The emeral...
Category

1890s Late Victorian Antique Diamond Rings

Materials

Diamond, Emerald, Gold, 18k Gold, Yellow Gold

David Rosenberg 19.09 Carat Emerald Cut GIA Three Stone Diamond Engagement Ring
Located in Boca Raton, FL
Rosenberg Diamonds & Co. 19.09 carat Emerald Cut J color SI1 clarity is accompanied by a GIA certificate. This spectacular Emerald is full of fire and it is set in a handmade platinu...
Category

21st Century and Contemporary Modern Diamond Rings

Materials

Diamond, White Diamond, Platinum

Vintage GIA 6.30 Radiant Cut Engagement Ring Solitaire
Located in Beverly Hills, CA
Vintage GIA 6.30 carat Radiant Cut Solitaire Engagement Ring. The diamond is GIA certified radiant cut 6.30 carat, K color, SI1 clarity. Accented by 20 Round Brilliant Cuts, approxim...
Category

2010s Diamond Rings

Materials

Diamond, Platinum

David Rosenberg 3.02 Carat Radiant Shape GIA Diamond Engagement Wedding Ring
Located in Boca Raton, FL
Rosenberg Diamonds & Co. 3.02 carat Radiant shape J color SI1 clarity is accompanied by a GIA certificate. This gorgeous Radiant is full of fire and is an exceptional SI1 that is set...
Category

21st Century and Contemporary Modern Diamond Rings

Materials

Diamond, White Diamond, 18k Gold, White Gold

Tiffany & Co. Schlumberger 'Eighteen Stone' Platinum and Diamond Ring
Located in New York, NY
Authentic Schlumberger for Tiffany & Co. ring crafted in platinum comprised of platinum X's and eighteen sparkling round brilliant cut diamonds weighing an estimated 1.33 carats (E-F...
Category

21st Century and Contemporary Diamond Rings

Materials

Diamond, Platinum

Tiffany & Co. 1.03 Carat Diamond Platinum Solitaire Engagement Ring
Located in Banbury, GB
This is a wonderful second hand, Tiffany & Co. engagement ring, which boasts a wonderful centre stone weighing 1.03 carat. The clarity is graded VS1 and the colour I. With A Sugges...
Category

2010s Diamond Rings

Materials

Diamond, Platinum

Antique Diamond and Ruby Target Ring, French, circa 1920
Located in London, GB
Antique diamond and ruby target ring. Centrally set with a round transitional cut diamond, F colour, VS1 clarity with an approximate weight of 2.46 carats, in an open back rubover se...
Category

1920s Art Deco Vintage Diamond Rings

Materials

Diamond, Platinum

Antique Late 19th Century Yellow Gold Diamond Opal Cluster Ring
Located in New York, NY
A fiery oval opal nineteenth century diamond ring. This lovely ring is ahead of its time, with the opal set east-west style. It is surrounded by 17 Old Mine cut diamonds weighing app...
Category

1890s Late Victorian Antique Diamond Rings

Materials

Diamond, Opal, 18k Gold, Yellow Gold

Pink Tourmaline 1.58 Carat Sapphires Diamonds 18 Karat Yellow Gold Bubble Ring
Located in Bangkok, TH
Pink Tourmaline 1.58 Carat Sapphires Diamonds 18 Karat Yellow Gold Bubble Ring Incredibly light and airy Ring from our Bubbles Collection. Yellow 18 Karat Gold is made in the form of...
Category

21st Century and Contemporary Contemporary Diamond Rings

Materials

Diamond, Sapphire, Tourmaline, Pink Sapphire, 18k Gold, Yellow Gold

18kt Gold Pink Ring with 27.40ct Huge Pear Shape Morganite & Multi Color Stones
Located in Antwerp, BE
Magnificent 18kt gold pink gold Huge Pear Shape Morganite Ring & Multi Color Natural Stones & Diamonds Centre stone: Natural Beryl Morganite Stone, Pear Mixed cut, intense pink, 27...
Category

21st Century and Contemporary Artisan Diamond Rings

Materials

Pink Sapphire, Morganite, Diamond, Gold, 18k Gold

Green Sapphire with Blue Sapphire and Diamond Ring Set in 18 Karat Rose Gold
Located in Bangkok, TH
Green Sapphire 10.23 carats with Blue Sapphire 3.34 carats and Diamond 0.59 carat Ring set in 18 Karat Rose Gold Settings Width: 1.9 cm Length: 2.6 cm Ring Size: 54 Total Weight:...
Category

2010s Contemporary Diamond Rings

Materials

Blue Sapphire, Green Sapphire, Diamond, 18k Gold, Rose Gold

GIA Certified 6.11 Carat Cushion Cut Diamond
Located in Rome, IT
GIA Certified 6.11 Carat Cushion Cut Diamond
Category

2010s Modern Diamond Rings

Materials

Diamond, White Diamond

15 Carat Sapphire Diamond Ring, Emerald Cut Sapphire 13 Carat W 2 Carat Diamonds
Located in Austin, TX
Striking Diamond & Sapphire Ring! This stunning ring is a gorgeous statement piece! Made with genuine natural diamonds and a genuine, blue sapphire gemstone. The center is a deep bl...
Category

21st Century and Contemporary Contemporary Diamond Rings

Materials

Diamond, Sapphire, 14k Gold, White Gold

Vivid Diamonds GIA Certified 7.73 Carat Emerald Cut Diamond Eternity Band
Located in Miami, FL
Vivid Diamonds eternity band crafted by hand in platinum, showcasing 17 spectacular GIA certified emerald cut diamonds weighing 7.73 carats total, D-E color, IF- VS2 clarity. Each di...
Category

21st Century and Contemporary Modern Diamond Rings

Materials

Diamond, Platinum

Antique 0.25 Carat Diamond Ruby ​​and Sapphire Three Stone Gold Ring, circa 1890
Located in Goettingen, DE
Antique 0.25 Carat Diamond Ruby ​​and Sapphire Three Stone Gold Ring, circa 1890 Late Victorian vertical three stone ring set with an oval cut diamond of 0.25 ct, accompanied, side ...
Category

1890s Victorian Antique Diamond Rings

Materials

Diamond, Ruby, Sapphire, 18k Gold, Silver, Gold

A.G.L Certified Emerald and Diamond Ring
Located in Bethesda, MD
An Emerald cut Emerald weighing 2.23 carats sits in an 18 karat pave diamond halo setting. ♦ Metal: 18 karat ♦ Emerald weighs 2.23 carats Certified Brazil with only minor traditional...
Category

2010s Diamond Rings

Materials

Diamond, Emerald, 18k Gold

Gold Oval Jade and Diamond Ring
Located in Dallas, TX
This stunning 13mm x 17mm oval cut jade is set in 14k Yellow Gold with a Diamond Halo. The ring is sized to a 6.5 and can be sized before shipping if needed.
Category

21st Century and Contemporary Art Nouveau Diamond Rings

Materials

Diamond, Jade, Gold

Cartier Square Pave Diamond Large White Gold Ring
Located in Holland, PA
18k White Gold Diamond Square Pave Diamond Large Ring by Cartier. This ring comes with a Cartier box. With Round brilliant cut diamonds VVS1 clarity, E color total weight approxima...
Category

20th Century Diamond Rings

Materials

Diamond, White Gold

Cartier Platinum Diamond 1895 Solitaire Ring 1.16ct G/VVS1 GIA Certified
Located in London, GB
A stunning platinum diamond engagement ring by Cartier from the 1895 solitaire collection. The ring comprises of a round brilliant cut diamond in a four claw setting with a weight of...
Category

21st Century and Contemporary Diamond Rings

Materials

Diamond, Platinum

0.39 Carat Diamond Onyx Men's Ring 14 Karat White Gold
By DGI
Located in Los Angeles, CA
This ring is set with 15 Round Cut White Diamonds that weight 0. 39 carats and also has Black Onyx imbedded in the middle of the ring. It is beautifully curated in 14 Karat White G...
Category

2010s Modern Diamond Rings

Materials

Onyx, Diamond, 14k Gold, White Gold

3.19 Carat Mens Ruby Diamond 14 Karat Yellow Gold
By DGI
Located in Los Angeles, CA
This amazing piece is set with a beautiful oval cut Ruby that weighs 2.45 Carats and has 12 Princess Cut Diamonds that weighs 0.46 Carats and 6 Round Cut Diamonds that weigh 0.28 Car...
Category

21st Century and Contemporary Modern Diamond Rings

Materials

Diamond, Ruby, 14k Gold, Yellow Gold

Tiffany & Co. 1900s Gubelin Certified Burma Blue Sapphire and Diamond Ring
Located in New York, NY
Tiffany And Co, 1910 Gublin Certified And AGL Certified Natural Burma No Heat Blue Sapphire And Diamond Ring. Blue Sapphire weight : 7 carat Diamond Weight : 1.50 carat approx Met...
Category

Early 1900s Art Deco Antique Diamond Rings

Materials

Diamond, Blue Sapphire, 18k Gold, Platinum

2.25 Carat GIA Certified Fancy Orange Brown Diamond Burmese Red Spinel Ring
Located in Antwerp, BE
One of a kind ring handmade in Belgium by jewellery designer Joke Quick, in 18K Rose gold 7,3 g. Set with a GIA Certified Fancy Deep Orange brown Marquise shape diamond centerstone ...
Category

2010s Contemporary Diamond Rings

Materials

Spinel, Diamond, Brown Diamond, Ruby, 18k Gold

GIA Certified 2.75 Carat Emerald Cut Diamond Ring E Color VS1 Clarity
Located in Rome, IT
The main stone is an amazing quality Gia Certified 2.20 Carat Emerald Cut Diamond E Color VS1 Clarity
Category

2010s Modern Diamond Rings

Materials

Diamond, White Gold

Emma Chapman Tsavorite Diamond 18k Gold Ring
Located in Frome, GB
This stunning one of a kind ring Emma Chapman Tsavorite Diamond 18k Gold Ring, has been handmade in our workshops. It features a central tsavorite which is set in 18ct gold. The ring...
Category

21st Century and Contemporary Contemporary Diamond Rings

Materials

Diamond, Tsavorite, Gold, 18k Gold

AnaKatarina 4 Elements "Air" Ring in Lapis, Diamonds, White and Yellow Gold
Located in Dedham, MA
The Four Elements Air Ring is a dazzling piece honoring both the visual and spiritual cosmos. A blue lapis lazuli ether is the background on which a luminous crescent moon and stars ...
Category

21st Century and Contemporary Contemporary Diamond Rings

Materials

Diamond, Lapis Lazuli, 18k Gold, White Gold, Yellow Gold

Tanzanite 12.42 Carat Diamonds Sapphires 18 Karat White Gold Bubbles Ring
Located in Bangkok, TH
Tanzanite 12.42 Carat Diamonds Sapphires 18 Karat White Gold Bubbles Ring Incredibly light and airy Ring from our Bubbles Collection. White 18 Karat Gold is made in the form of varie...
Category

21st Century and Contemporary Contemporary Diamond Rings

Materials

Sapphire, Diamond, Pink Sapphire, Tanzanite, 18k Gold, White Gold

Exquisite 8.10 Carat Baguette Diamond Platinum Eternity Band
Located in New York, NY
This unique and masterfully handcrafted platinum eternity band is set with 26 in size graduating white and bright baguette cut diamonds, with a total diamond weight of 8.10 carats. E...
Category

2010s Contemporary Diamond Rings

Materials

Diamond, Platinum

Green Emerald and Emerald Cut Diamond Bypass Ring
Located in New York, NY
A beautiful crossover/bypass ring design from the 1970's showcasing a vibrant green emerald and an emerald cut diamond in a platinum / 18k yellow gold mounting. Total weight of both...
Category

1970s Vintage Diamond Rings

Materials

Diamond, Emerald, 14k Gold, Yellow Gold, Platinum

Graff Baguette Diamond Wave Cocktail Platinum Ring
Located in Feasterville, PA
A fabulous Graff Diamond eternity ring showcasing 4.80cts of the finest baguette cut diamonds set in platinum. The ring measures a size 6 1/2
Category

Early 2000s Diamond Rings

Materials

Diamond, Platinum

J.P. Caldwell Art Deco Old European Cut Diamond Platinum Ring
Located in New York, NY
Beautifully designed and masterfully handcrafted this Art Deco ring from ca 1925 is a unique piece of period jewelry. With detailed hand-engraving and ajour work along the sides of t...
Category

1920s Art Deco Vintage Diamond Rings

Materials

Diamond, Platinum

Vintage JB Star 8.85 Carats Emerald Diamond 18 Karat Gold Statement Ring
Located in Philadelphia, PA
Centering a cushion cut Zambian emerald that weighs approximately 6.85 carats Translucent with natural inclusions - bright bluish green in color - moderate clarity enhancements (F2)...
Category

1980s Contemporary Vintage Diamond Rings

Materials

Diamond, White Diamond, Emerald, Gold, 18k Gold, White Gold, Yellow Gold

Van Cleef & Arpels Vintage 18k Yellow Gold 0.58 Ct Diamond and 1.10 Ct Ruby Ring
Located in Southampton, PA
This pretty Van Cleef & Arpels 18K Yellow Gold 0.58 ct Diamond 1.10 ct Ruby Ring is made with 18K yellow gold and set with two rows of round diamonds totaling 0.58 carats and flankin...
Category

20th Century Diamond Rings

Materials

Diamond, Ruby, 18k Gold, Yellow Gold

Antique and Vintage Diamond Jewelry and Watches

Diamonds and antique 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 “Diamonds Are 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 the stone 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 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 diamonds 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.

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