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Diamond Solitaire Rings

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Tiffany & Co. 0.57ct Round I VS1 Diamond Solitaire Engagement Ring, 18kt Rose
Located in Houston, TX
This precious Tiffany & Co. engagement ring features a dainty 0.57ct round brilliant cut diamond, I VS1. The diamond is placed in a platinum setting and an 18kt rose gold engagement ...
Category

21st Century and Contemporary Diamond Solitaire Rings

Materials

Diamond, 18k Gold, Rose Gold, Platinum

Ruby Diamond Cluster 18 Karat Yellow Gold Solitaire Bridal AIG Certified Ring
Located in Milano, IT
Iconic and modern gold ring with an oval ruby (1.30 carat) with 12 round brilliant diamonds surrounding and forming a flower shape. The delicate 18 karat gold threads complement the ...
Category

21st Century and Contemporary Romantic Diamond Solitaire Rings

Materials

Diamond, Ruby, Gold, 18k Gold, Yellow Gold

Tiffany & Co Platinum Diamond Solitaire Engagement Ring with Round 2.25 Ct HVS1
Located in New York, NY
Tiffany & Co Platinum Solitaire Engagement Ring finely crafted in a six prong platinum mounting with one Round brilliant cut diamond center weighing 2.25 cts H color VS1 clarity. Dia...
Category

2010s Modern Diamond Solitaire Rings

Materials

Diamond, Platinum

Aquamarine Diamond Platinum Cocktail Ring
Located in Los Angeles, CA
Aquamarine diamond and platinum cocktail ring circa 1950. We are here to connect you with beautiful and affordable antique and estate jewelry. SPECIFICATIONS: Contact us right a...
Category

Mid-20th Century Modern Diamond Solitaire Rings

Materials

Aquamarine, Diamond, Platinum

Yianni Creations Amethyst and Diamond Fine Silver Palladium Wide Band Ring
Located in Astoria, NY
Yianni Creations Ammos Collection 100% Handmade Artisan Ring from Fine Silver featuring a 1.25 Oval Cut Amethyst accompanied by a 0.03 Carat Brilliant Cut White Diamond complemented ...
Category

21st Century and Contemporary Contemporary Diamond Solitaire Rings

Materials

Black Pearl, Cultured Pearl, Freshwater Pearl, Peridot, Topaz, Blue Topa...

6.13 Carat Indicolite Diamond White Gold Ring “Wave” Wagner Collection
Located in Berlin, DE
Striking design by Clemens Ritter von Wagner. The ring is made of 750/0 white gold with a 6.13 carats emerald cut indicolite of stunning green-blue color. The sides of the „wave“ are...
Category

21st Century and Contemporary Modern Diamond Solitaire Rings

Materials

Diamond, Tourmaline, 18k Gold, White Gold

Blue Sapphire with Diamond Ring Set in 18 Karat Gold Settings
Located in Bangkok, TH
Blue Sapphire 1.55 carats with Diamond 0.05 carat Ring set in 18 Karat Gold Settings Width: 0.6 cm Length: 0.8 cm Ring Size: 51 Total Weight: 5.27 grams "We first opened doors in...
Category

2010s Contemporary Diamond Solitaire Rings

Materials

Diamond, Blue Sapphire, Gold, 18k Gold

GIA Report Certified 1.03 Carat Diamond Platinum Engagement Ring
Located in Los Angeles, CA
GIA report certified 1.03 carat old European cut diamond and platinum engagement ring dated 1938. Love it because it caught your eye and we are here to connect you with beautiful an...
Category

1930s Art Deco Vintage Diamond Solitaire Rings

Materials

Diamond, Platinum

GIA Certified 3.02 Carat Radiant Natural Yellow Diamond
Located in Chicago, IL
Canary Yellow Diamonds are the most sought-after and valuable type of yellow diamonds. Like the canary bird, these diamonds exhibit a deep, intense yellow hue, as opposed to a dull o...
Category

2010s Contemporary Diamond Solitaire Rings

Materials

Yellow Diamond

GIA Certified 4 Carat E VVS2 Round Cut Diamond Solitaire 18k White Gold Ring
Located in Rome, IT
GIA Certified 4 Carat E VVS2 Round Cut Diamond Solitaire 18k White Gold Ring
Category

2010s Modern Diamond Solitaire Rings

Materials

Diamond, White Gold

Ruby with Diamond Ring Set in 18 Karat White Gold Settings
Located in Bangkok, TH
Ruby 0.51 carat with Diamond 0.06 carat and Ruby 0.50 carat Ring set in 18 Karat White Gold Settings Width: 0.5cm Length: 0.6 cm Ring Size: 53 Total Weight: 3.15 grams "We first ...
Category

2010s Contemporary Diamond Solitaire Rings

Materials

Diamond, Ruby, 18k Gold, White Gold

GIA Certified 3.5 Carat Radiant Yellow Diamond
Located in Chicago, IL
Canary Yellow Diamonds are the most sought-after and valuable type of yellow diamonds. Like the canary bird, these diamonds exhibit a deep, intense yellow hue, as opposed to a dull o...
Category

2010s Contemporary Diamond Solitaire Rings

Materials

Yellow Diamond

Blue Sapphire with Diamond Ring Set in 18 Karat White Gold Settings
Located in Bangkok, TH
Blue Sapphire 3.69 carats with Diamond 1.52 carats Ring set in 18 Karat White Gold Settings Width: 1.2 cm Length: 1.2 cm Ring Size: 52 Total Weight: 10.82 grams "We first opened ...
Category

2010s Contemporary Diamond Solitaire Rings

Materials

Diamond, Blue Sapphire, White Gold, 18k Gold

Art Deco 4.21 Carat Old European Cut Diamond & Platinum Ring 1920's
Located in QLD , AU
Are you looking for the perfect engagement ring or maybe a ring to celebrate a special milestone in your life. This original Art Deco 1920's ring is set with a central 4.21ct old Eu...
Category

20th Century Art Deco Diamond Solitaire Rings

Materials

Diamond, Platinum

GIA Certified 4.01 Carat Pear Yellow Diamond
Located in Chicago, IL
Canary Yellow Diamonds are the most sought-after and valuable type of yellow diamonds. Like the canary bird, these diamonds exhibit a deep, intense yellow hue, as opposed to a dull o...
Category

2010s Contemporary Diamond Solitaire Rings

Materials

Yellow Diamond

GIA Certified 3.57 Carat Cushion Yellow Diamond
Located in Chicago, IL
Canary Yellow Diamonds are the most sought-after and valuable type of yellow diamonds. Like the canary bird, these diamonds exhibit a deep, intense yellow hue, as opposed to a dull o...
Category

2010s Contemporary Diamond Solitaire Rings

Materials

Yellow Diamond

GIA Certified 4 Carat Asscher Cut Diamond Solitaire Ring
Located in Rome, IT
GIA Certified 4 Carat Asscher Cut Diamond Solitaire Ring
Category

2010s Modern Diamond Solitaire Rings

Materials

Diamond, White Diamond

The One Aquamarine with Baguette Diamond Engagement Ring in 14K White Gold
Located in Bangkok, TH
This beautiful ring has a single 9x7 mm. natural aquamarine with traditional emerald cut, prong-set in an elegant mount with daylight shoulders. Featuring a baguette diamond on each ...
Category

21st Century and Contemporary Art Deco Diamond Solitaire Rings

Materials

Aquamarine, Diamond, 14k Gold, White Gold

Tiffany & Co. Solitaire Engagement Ring .53 Ct IVS1 in Platinum Excellent Cut
Located in New York, NY
Tiffany & Co Round Brilliant Solitaire Engagement Ring featuring a 0.53 ct Center I color, VS1 clarity, finely crafted in a 6 prong Platinum Mounting. ( Current Retail for $6,300) In...
Category

20th Century Modern Diamond Solitaire Rings

Materials

Diamond, Platinum

GRS Pigeon Blood 1.13 Carat Burmese No Heat Ruby and Diamond Ring 18 Karat Gold
Located in Bangkok, TH
A brand new 1.13 carat Burmese ruby ring mounted with diamonds in 18 Karat white gold and pink gold rhodium. The ruby weighs 1.13 carat and is certified by Gem Research Swisslab (GRS...
Category

2010s Diamond Solitaire Rings

Materials

Diamond, Ruby, Gold, 18k Gold, Rose Gold

Vintage Van Cleef & Arpels Fine Vivid Red Ruby & Diamond Butterfly Marquise Ring
Located in Bristol, GB
Vintage Van Cleef & Arpels Fine Ruby & Diamond 18k Yellow Gold Ring A stunning vintage ring with a unique design typical of Van Cleef & Arpels, set with a 0.33ct marquise/navette c...
Category

20th Century Diamond Solitaire Rings

Materials

Diamond, Ruby, Gold, 18k Gold, Yellow Gold

Crystal, Tanzanite and Diamond Flower Ring
Located in Nantucket, MA
A carved floral crystal with a faceted tanzanite center stone. Bordered with round, brilliant cut diamonds in a pave` setting. All set in an oxidized sterling silver. Diamonds alo...
Category

21st Century and Contemporary Diamond Solitaire Rings

Materials

Crystal, Diamond, Tanzanite, Sterling Silver

Tiffany & Co. Harmony Diamond Engagement Ring in Platinum I VS1 0.36 CTW
Located in New York, NY
Tiffany & Co. Harmony Diamond Engagement Ring in Platinum I VS1 0.36 CTW PRIMARY DETAILS SKU: 112097 Listing Title: Tiffany & Co. Harmony Diamond Engagement Ring in Platinum I VS1 0...
Category

2010s Diamond Solitaire Rings

Materials

Diamond, Platinum

Mystic Topaz Ring in Cushion Shape w Accent Diamonds 8.43 Carats, Purple Green
Located in Austin, TX
It’s a mystery how this Mystic Topaz reflects so many colors! The ring is made out of solid 14 karat yellow gold. Everyone who looks at this 8.36 Mystic Topaz is always thrilled with...
Category

21st Century and Contemporary Contemporary Diamond Solitaire Rings

Materials

Diamond, Topaz, 14k Gold, Yellow Gold

Blue Sapphire 0.52 Carat with Diamond 0.07 Carat Ring Set in 18 Karat White Gold
Located in Bangkok, TH
Blue Sapphire 0.52 carat with Diamond 0.07 carat Ring set in 18 Karat White Gold Settings Width: 1.0 cm Length: 0.4 cm Ring Size: 53 Total Weight: 3.27 grams "We first opened doo...
Category

2010s Contemporary Diamond Solitaire Rings

Materials

Diamond, Blue Sapphire, 18k Gold, White Gold

Fantastic GIA Certified Huge 10 Carat Pear Cut Diamond Solitaire Ring
Located in Rome, IT
Fantastic GIA Certified Huge 10 Carat Pear Cut Diamond Solitaire Ring
Category

2010s Modern Diamond Solitaire Rings

Materials

Diamond, White Diamond, 18k Gold

Exceptional Flawless GIA Certified 3.05 Carat Oval Diamond Engagement Ring
Located in Rome, IT
An amazing ring by Antinori Fine Jewels, centering on a 3.05 carat E Color Flawless oval-cut diamond. Flanking the center are baguette diamonds on either, set in an everlasting pla...
Category

2010s Modern Diamond Solitaire Rings

Materials

Diamond, White Diamond, Platinum

Tiffany Diamond Engagement Halo Ring Platine
Located in Geneva, CH
Tiffany & Co. Halo diamond engagement ring. The primary oval diamond is 0.55 carat, D colour and it is surrounded by 38 small round brilliant-cut diamonds (total weight 0.27 carat)....
Category

21st Century and Contemporary Art Deco Diamond Solitaire Rings

Materials

Diamond, Platinum

Edwardian 0.7ct Old Cut Diamond and Platinum Solitaire Engagement Ring
Located in St Helens, GB
A superb antique diamond ring, circa 1900. Solid platinum example throughout. Designed with an old mine cut diamond in an eight claw mount to centre. Approx 0.65 - 0.7 carat. Three f...
Category

20th Century Edwardian Diamond Solitaire Rings

Materials

Diamond, Platinum

GIA Certified 2.64 Carat Old European Cut Diamond VVS2
Located in Rome, IT
This stunning 2.64 carat old European cut certified diamond has beautiful color, a completely eye clean appearance, and dazzlingly bright sparkle! Cut by hand a lifetime ago, this su...
Category

2010s Diamond Solitaire Rings

Materials

Diamond, White Diamond

Flawless Round Brilliant Cut Fancy Intense Blue Diamond
Located in Rome, IT
An exquisite diamond for investment purposes a one of a kind flawless clarity fancy intense blue diamond certified by GIA. This type of diamonds are mined in a very limited number o...
Category

2010s Modern Diamond Solitaire Rings

Materials

Blue Diamond, Diamond

.90ct Natural Round Sapphires Diamonds Band 14 Karat
Located in New York, NY
Classic Diamond & Sapphires, S Band .50ct. Natural Round Cut Sapphires Vibrant Royal Blue & transparent Full cut and Full Faceted. .40ct round cut diamonds on side. H-color Vs...
Category

2010s Diamond Solitaire Rings

Materials

Diamond, Sapphire, 14k Gold, Yellow Gold

Engagement Ring in 18K White Gold with a 0.5 Carat Diamond
Located in Vannes, FR
18 karat white gold engagement ring with a 0.5 carat diamond Propose to the one you love with a Solitaire Engagement Ring. It has a 0.5 karat Diamond mounted on 18 karat White Gold...
Category

21st Century and Contemporary Artisan Diamond Solitaire Rings

Materials

Diamond, 18k Gold, White Gold

1.01 Carat, Natural, Pear-Shape, Light Yellow, SI-1 Diamond Ring Set in Platinum
Located in Tokyo, JP
An elegant Chuo Gem Laboratory (Japan) Certified 1.01 Carat, Natural, Pear-Shape, Light Yellow, SI-1 Diamond in Solitaire Setting accompanied by 0.26 Carats of White Round Brilliant ...
Category

21st Century and Contemporary Modern Diamond Solitaire Rings

Materials

Diamond, Yellow Diamond, Platinum

GIA Certified Bezel Set Diamond Solitaire Ring in 14K Yellow Gold L I2 1.52 CTW
Located in New York, NY
GIA Certified Bezel Set Diamond Solitaire Ring in 14K Yellow Gold L I2 1.52 CTW PRIMARY DETAILS SKU: 105966 Listing Title: GIA Certified Bezel Set Diamond Solitaire Ring in 14K Yell...
Category

2010s Diamond Solitaire Rings

Materials

Diamond, Yellow Gold

Classic Oval Shape Aquamarine Cocktail Solitaire Ring with Diamonds in 18k Gold
Located in New York, NY
Classic Oval Shape Aquamarine Cocktail Solitaire Ring with Diamonds in 18k Yellow Gold with a designer shank is a simply beautiful. 18KT: 4.659gms Diamond: 0.76cts Aquamarine: 4.49cts
Category

21st Century and Contemporary Modern Diamond Solitaire Rings

Materials

Aquamarine, Diamond, 18k Gold

Antique Natural Pearl, Diamond and Platinum Ring, GIA Certified, circa 1910
Located in Aspen, CO
Antique platinum and diamond ring centering a very fine natural salt water pearl. This large natural pearl has been examined by the Gemological Institute of American and has been id...
Category

Early 20th Century Edwardian Diamond Solitaire Rings

Materials

Diamond, Natural Pearl, Platinum

Emerald with Diamond Ring Set in 18 Karat Gold Settings
Located in Bangkok, TH
Emerald 3.49 carats with Diamond 1.31 carats Ring set in 18 Karat Gold Settings Width: 1.4 cm Length: 1.7 cm Ring Size: 54 Total Weight: 6.55grams "We first opened doors in 1980 ...
Category

2010s Contemporary Diamond Solitaire Rings

Materials

Diamond, Emerald, Gold, 18k Gold

GIA Certified 1.30 Carat Oval Diamond Platinum Ring
Located in Rome, IT
eye-catching 1.30ct GIA certified oval cut diamond has excellent E color, a completely eye clean appearance, and gorgeous, lively brilliance! Measuring 9.32 x 5.76mm, the diamond has...
Category

2010s Modern Diamond Solitaire Rings

Materials

Diamond, White Diamond, Platinum

Internally Flawless Carat GIA Certified 8.16 Square Emerald Cut Diamond
Located in Rome, IT
Amazing and huge very clear and white natural square emerald cut diamond certified by GIA. Inquire us about videos or pictures is a real amazing diamond!
Category

2010s Modern Diamond Solitaire Rings

Materials

Diamond, White Diamond, Emerald

12.55 Ct. Fire Opal & Pave' Diamond Designer Ring in 18K Gold by Assor Gioielli
Located in Honolulu, HI
Magnificent fire opal & champagne diamond ring by Assor Gioielli. This ring features a stunning 12.55 carats large oval cabochon orange fire opal set in a well crafted 18k white gold...
Category

21st Century and Contemporary Modern Diamond Solitaire Rings

Materials

Diamond, Opal, Fire Opal, 18k Gold

1930s Filigree Old European Diamond Ring
Located in Bethesda, MD
A highly detailed filigree platinum diamond ring from the 1930s ♦ Metal: Platinum ♦ Old European cut diamond=.85 carats H color, VS2 clarity ♦ 4 Diamonds=.15 carats ♦ Circa1930s ♦ S...
Category

1930s Vintage Diamond Solitaire Rings

Materials

Diamond, Platinum

Emerald with Diamond Ring Set in 18 Karat Gold Settings
Located in Bangkok, TH
Emerald 0.76 carat with Diamond 0.32 carat Ring set in 18 Karat Gold Settings Width: 0.8 cm Length: 1.0 cm Ring Size: 52 Total Weight: 3.49 grams "We first opened doors in 1980 w...
Category

2010s Contemporary Diamond Solitaire Rings

Materials

Emerald, Diamond, Gold, 18k Gold

Antique 1890s 0.41 Carat Diamond and Rose Gold with Silver Set Solitaire Ring
Located in Jesmond, Newcastle Upon Tyne
A fine and impressive antique 0.41 carat diamond and 18 karat rose gold, silver set solitaire ring; part of our diverse antique jewelry/estate jewelry collections. This fine antique...
Category

1890s Antique Diamond Solitaire Rings

Materials

Diamond, Silver, 18k Gold, Rose Gold

GIA Certified 3 Carat Round Brilliant Cut Diamond Solitaire Ring
Located in Rome, IT
This dazzling 3.01 carat GIA certified triple excellent diamond is beautifully white, 100% eye clean, and displays absolutely phenomenal sparkle! This diamond was hand selected as it...
Category

2010s Modern Diamond Solitaire Rings

Materials

Diamond, White Diamond

Diamond and Platinum Solitaire Engagement Ring
Located in Jesmond, Newcastle Upon Tyne
A fine 0.99 carat modern brilliant round cut diamond and platinum solitaire ring; part of our diverse range of diamond jewelry/jewelry This fine contemporary diamond solitaire ring ...
Category

Early 2000s Contemporary Diamond Solitaire Rings

Materials

Diamond, Platinum

Diamond and Platinum Solitaire Engagement Ring
Located in Jesmond, Newcastle Upon Tyne
An impressive contemporary 0.45 carat diamond and platinum solitaire style engagement ring; part of our diverse diamond jewelry and estate jewelry collections. This fine and impress...
Category

Early 2000s Diamond Solitaire Rings

Materials

Diamond, Platinum

Retro GIA Old European Cut Diamond 18 Karat Gold Solitaire Engagement Ring
Located in Beverly Hills, CA
One Retro GIA Old European Cut Diamond 18k Gold Solitaire Engagement Ring. Featuring one 0.96 carat old European cut diamond accompanied with certificate #2225077521 stating the diam...
Category

1940s Vintage Diamond Solitaire Rings

Materials

Diamond, Gold, 18k Gold, Rose Gold, Platinum

Solitaire Ring with a 5.23 Carat Diamond in the Center
Located in Paris, FR
Solitaire ring in 18 kt white gold centered with a large modern brilliant cut Diamond weighing 5.23 carats Color J clarity SI2. The stone is accompanied by its CCIP Certificate 16 S...
Category

1990s Diamond Solitaire Rings

Materials

Diamond, 18k Gold, White Gold

Nally Natural Fancy Green-Yellow Diamond Ring GIA
Located in New York, NY
NALLY Exquisite Diamond Ring, with 3.60 carat Cut-Cornered Rectangular Modified Brilliant Cut center diamond Color: Natural Fancy Green-Yellow, Clarity: VS1. Gia#xxxxxxxxxx Surroun...
Category

21st Century and Contemporary Artist Diamond Solitaire Rings

Materials

Yellow Diamond, 18k Gold

Suzy Levian 14 Karat White Gold Colombian Emerald White Diamond Engagement Ring
Located in Great Neck, NY
This spectacular ring from the Suzy Levian Limited Edition collection features a Colombian emerald gemstone held in an emerald-shaped 14K white gold prong setting. An array of 138 si...
Category

21st Century and Contemporary Contemporary Diamond Solitaire Rings

Materials

Diamond, White Diamond, Emerald, Gold, 14k Gold, White Gold

GIA Certified Platinum Princess Cut Diamond Ring 1.03 Carat
Located in London, GB
A princess cut diamond ring in platinum. The ring is set with a 1.03ct princess cut diamond, G colour and VS1 clarity. The ring is currently a size UK M - EU 52 - US 6 but can be adj...
Category

21st Century and Contemporary Diamond Solitaire Rings

Materials

Diamond, Platinum

5ct Solitaire Traceable Diamond Ring In 18 Karat Yellow Gold By Rocks For Life
Located in Haddonfield, NJ
The No.1 Solitaire ring is designed to maximise the brilliance and luminosity of the diamond. Our distinctive halo is carefully engineered to elevate the diamond, emphasizing its si...
Category

21st Century and Contemporary Contemporary Diamond Solitaire Rings

Materials

Diamond, 18k Gold, Yellow Gold

2.24 Carat Round Cut Blue Zircon and Diamond Ring, 14 Karat White Gold Halo
Located in Greensboro, NC
Your quest for the perfect birthday or anniversary gift ends here with this gorgeous ring! Fashioned in popular 14k white gold, this NEW piece features a blue zircon solitaire framed...
Category

21st Century and Contemporary Diamond Solitaire Rings

Materials

Diamond, Zircon, 14k Gold, White Gold

Cushion Shape Natural Morganite and Diamond Halo Engagement Ring 18K Rose Gold
Located in Hong Kong, HK
Product Specifications: Type: 2.00ct Natural High Quality Cushion Cut Champagne Morganite (7.5mm x 7.5mm) Type: 62 High Quality Round Brillant Cut Diamond Total carat weight: Approx....
Category

2010s Modern Diamond Solitaire Rings

Materials

Diamond, Morganite, 18k Gold, Rose Gold

GIA Certified Three Stone Radiant Cut Trapezoid Diamond Ring
Located in Rome, IT
GIA Certified Three Stone Radiant Cut Trapezoid Diamond Ring
Category

2010s Modern Diamond Solitaire Rings

Materials

Diamond, White Diamond

2.4 Carat Oval Tsavorite & 2 Carat Diamond in 18 Karat White Gold Ring Estate
Located in New York, NY
2.4 Carat Oval Tsavorite and 2 Carat Diamond in 18 Karat White Gold Ring Estate Size 6 Tsavorite of this color and size are very precious! Approximately 2.4 Carat long Oval cut Tsav...
Category

2010s Diamond Solitaire Rings

Materials

Diamond, Tsavorite, 18k Gold, White Gold, Gold

GIA Certified 2 Carat Oval Diamond Platinum Ring
Located in Rome, IT
GIA Certified 2 Carat Oval Diamond Platinum Ring G Color VS2 Clarity
Category

2010s Modern Diamond Solitaire Rings

Materials

Diamond, White Diamond, Platinum

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.