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Diamond Solitaire Rings

59
6,549
15
to
1,750
4,498
1,275
3
3.25
3.5
3.75
4
4.25
4.5
4.75
5
5.25
5.5
5.75
6
6.25
6.5
6.75
7
7.25
7.5
7.75
9
70
1,262
5,223
58
1,151
203
52
47
46
3,617
2,888
59
3,938
1,254
2,256
1,787
2,275
6,564
1,935
993
837
425
2016
990
626
595
454
to
1,745
1,637
604
97
83
Gemstone: Diamond
GIA GRS Certified 4 Carat Oval Blue Sapphire Diamond Platinum Ring
Located in Rome, IT
GIA GRS Certified 4 Carat Oval Blue Sapphire Diamond Platinum Ring
Category

2010s Modern Diamond Solitaire Rings

Materials

Diamond, White Diamond, Blue Sapphire, Platinum

IGI Antwerp Certified 6 Carat Emerald Diamond Ring
Located in Rome, IT
IGI ANTWERP Certified 6 Carat Emerald Diamond Ring
Category

2010s Modern Diamond Solitaire Rings

Materials

Diamond, White Diamond, Emerald

Burmese Ruby 3.34ct and Diamond Gold Ring, Georgian, ca. 1800
Located in Idar-Oberstein, DE
Beautiful Burmese Ruby and Diamond Gold Ring, Georgian, ca. 1800. The unheated cushion-shaped Burmese ruby, 3.34cts, set within naturalistic trellis work, filled with 16 old-cut dia...
Category

Early 19th Century Georgian Antique Diamond Solitaire Rings

Materials

Diamond, Ruby, Gold

Tiffany & Co. Oval Diamond Engagement
Located in New York, NY
Tiffany & Co. Oval Diamond Engagement Ring. This diamond ring has a 4.00ct oval brilliant cut diamond center (Color: F, Clarity: VVS2, GIA#21859869, Tiffany H05110692) in a diamond h...
Category

21st Century and Contemporary Artist Diamond Solitaire Rings

Materials

Diamond, Platinum

GIA Certified 2 Carat Ruby Diamond Ring
Located in Rome, IT
GIA Certified 2 Carat Ruby Diamond Ring
Category

2010s Modern Diamond Solitaire Rings

Materials

Diamond, White Diamond, Ruby

Internally Flawless GIA Certified 8.31 Carat Oval Diamond Ring
Located in Rome, IT
An exquisite internally flawless clarity 8.31 carat oval diamond certified by the GIA The ring has been handmade in Italy in solid platinum two tapered baguette
Category

2010s Modern Diamond Solitaire Rings

Materials

Diamond, White Diamond, Platinum

GIA Certified 3.21 Carat Radiant Cut Diamond Solitaire Ring D Color
Located in Rome, IT
GIA Certified 3.21 Carat Radiant Cut Diamond Solitaire Ring D COLOR
Category

2010s Modern Diamond Solitaire Rings

Materials

Diamond, White Diamond, Platinum

Morganite with Pink Sapphire and Diamond Ring in 18 Karat White Gold Settings
Located in Bangkok, TH
Morganite 1.83 carats with Pink Sapphire 0.50 carat and Diamond 0.52 carat Ring set in 18 Karat White Gold Settings Width: 0.8 cm Length: 0.8 cm Ring Size: 51 Total Weight: 6.86 g...
Category

2010s Diamond Solitaire Rings

Materials

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

Yianni Creations Blue Topaz and Diamond Fine Silver and 24 Karat Gold Wide Ring
Located in Astoria, NY
Yianni Creations Midas Collection 100% Handmade Artisan Gorgeous Ring from Fine Silver with an overlay of 24 Karat Yellow Gold features 1.60 Carat London Blue Topaz accompanied by 0....
Category

21st Century and Contemporary Contemporary Diamond Solitaire Rings

Materials

Amethyst, Aquamarine, Citrine, Blue Diamond, Yellow Diamond, Pink Diamon...

14k Gold Dandelion Flower Ring with Sapphires and Diamonds
Located in Istanbul, TR
14k gold dandelion flower ring with sapphires and diamonds Weight: 1.8 g. Gold - 14k gold Central stone: sapphire Cut: round cabochon Weight: aprx 0.3 ct. Color: yellow Clarity: Tr...
Category

2010s Modern Diamond Solitaire Rings

Materials

Diamond, Sapphire, 14k Gold

Blue Sapphire with Diamond Carat Ring Set in 18 Karat White Gold Settings
Located in Bangkok, TH
Blue Sapphire 0.48 carat with Diamond 0.07 carat Ring set in 18 Karat White Gold Settings Width: 0.5 cm Length: 0.6 cm Ring Size: 52 Total Weight: 3.11 grams "We first opened doo...
Category

2010s Art Deco Diamond Solitaire Rings

Materials

Diamond, Blue Sapphire, 18k Gold, White Gold

Antique Russian Diamond Ring
Located in Cairo, EG
Antique Russian old mine cut diamond ring centered with 2 old mine cut diamonds in detaled prongs with an estimate diamond weight of 1.90 carats 6mm diameter each flanked with with 2...
Category

Early 1900s Antique Diamond Solitaire Rings

Materials

Diamond, 14k Gold

GIA Certified VVS1 Fancy Purplish Pink Radiant Cut Platinum Diamond Ring
Located in Rome, IT
GIA Certified VVS1 Fancy Purplish Pink Radiant Cut Platinum Diamond Ring
Category

2010s Modern Diamond Solitaire Rings

Materials

Diamond, White Diamond, Pink Diamond, Platinum

GIA Certified 30 Carat Emerald Cut Flawless Diamond Ring
Located in Rome, IT
An exquisite 30 carat flawless emerald cut diamond with two tapered baguette diamonds color is F clarity is VVS1 Excellent polish Excelelnt symmetry None Fluorescence 20 mm!
Category

2010s Modern Diamond Solitaire Rings

Materials

Diamond, White Diamond, Emerald, Platinum

1.28 Carat Natural Sapphire Diamond Solitaire Ring
Located in Rome, IT
stunning sapphire and diamond ring is positively gleaming with eye catching sparkle! The 1.28 carat sapphire center has a beautiful cornflower blue hue and sparkles with gorgeous br...
Category

2010s Modern Diamond Solitaire Rings

Materials

Sapphire, Blue Sapphire, Diamond, White Diamond, 14k Gold

Cartier 1895 Diamond Engagement Ring Ring in Platinum E VVS1 0.21 CTW
Located in New York, NY
Cartier 1895 Diamond Engagement Ring Ring in Platinum E VVS1 0.21 CTW PRIMARY DETAILS SKU: 117544 Listing Title: Cartier 1895 Diamond Engagement Ring Ring in Platinum E VVS1 0.21 CT...
Category

21st Century and Contemporary Diamond Solitaire Rings

Materials

Diamond, Platinum

GIA Certified 4.54 Carat Asscher Cut Engagement Ring with Natural Pink Diamonds
Located in New York, NY
Diamond engagement ring set in 14K pink gold with GIA certificate, no. 110208231267. Details are: Center stone: 4.54ct / J VS2 Asscher/ square emerald cut diamond with fancy light pi...
Category

21st Century and Contemporary Contemporary Diamond Solitaire Rings

Materials

Diamond, White Diamond, Pink Diamond, Rose Gold

3ct Ceylon Sapphire Forget Me Knot Diamond Ring
Located in Brisbane, AU
*Custom made to order* 3ct Natural Ceylon Sapphire Emerald cut Set with Natural E/Fsi white diamonds In platinum ( also available in 22ct yellow, 18ct yellow /white or rose gol...
Category

2010s Artist Diamond Solitaire Rings

Materials

Diamond, Sapphire, Platinum

"Oops" Solitaire with 2 Carat Rhodolite Garnet & 10 Tiny Diamonds in Yellow Gold
Located in Sherman Oaks, CA
Story time! Eytan Brandes was asked to make an engagement ring with a bulgy band and a setting for a nice two carat diamond. When the ring came back from the caster, the band was a...
Category

2010s Contemporary Diamond Solitaire Rings

Materials

Diamond, White Diamond, Garnet, Rhodolite, Gold, 14k Gold, Yellow Gold

11.55 Carat Octagonal Cut Citrine Solitaire Cocktail Ring with Diamond Accents
Located in Scottsdale, AZ
Ring size: 6.75 Gorgeous octagonal cut citrine cocktail ring set in yellow gold. The substantial stone sits high on the finger while the delicate accent diamonds add an extra hint o...
Category

Late 20th Century Contemporary Diamond Solitaire Rings

Materials

Citrine, Diamond, Gold, 14k Gold, Yellow Gold

GIA Certified 3.13 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

Exceptional GIA Certified 3 Carat Internally Flawless Emerald Cut Diamond Ring
Located in Rome, IT
EXCEPTIONAL GIA Certified 3 Carat Internally Flawless Emerald Cut Diamond Ring
Category

2010s Modern Diamond Solitaire Rings

Materials

Diamond, White Diamond, Emerald, Platinum

Cartier 1895 Diamond Engagement Ring in Platinum G VS1 0.35 CTW
Located in New York, NY
Cartier 1895 Diamond Engagement Ring in Platinum G VS1 0.35 CTW PRIMARY DETAILS SKU: 116576 Listing Title: Cartier 1895 Diamond Engagement Ring in Platinum G VS1 0.35 CTW Condition ...
Category

21st Century and Contemporary Diamond Solitaire Rings

Materials

Diamond, Platinum

J. Birnbach GIA Certified 2.08 Carat D VS1 Radiant Cut Diamond Solitaire Ring
Located in New York, NY
This scintillating stunner features a certified 2.08 carat radiant cut diamond of D color and VS1 clarity as described by GIA grading report #2171920456. Set in a handmade, platinum ...
Category

21st Century and Contemporary Contemporary Diamond Solitaire Rings

Materials

Diamond, Platinum

GRS Pigeon Blood 0.86 Carat Burmese No Heat Ruby and Diamond Ring 18 Karat Gold
Located in Bangkok, TH
A brand new 0.86 carat Burmese ruby ring mounted with diamonds in 18 Karat gold. The ruby weighs 0.86 carat and is certified by Gem Research Swisslab (GRS) as natural, no heat, and '...
Category

2010s Diamond Solitaire Rings

Materials

Diamond, Ruby, Gold, 18k Gold, White Gold

EGL Certified Platinum & Diamond Solitaire Eternity Engagement Ring 5.49ctw
Located in Tustin, CA
We are pleased to offer this EGL Certified Platinum & Diamond Solitaire Eternity Engagement Ring. This stunning ring features an EGL USA certified 4.34ct J/SI3 round brilliant cut di...
Category

2010s Contemporary Diamond Solitaire Rings

Materials

Diamond, Platinum

GIA Certified Old Mine Cut Diamond Engagement Ring in 14K Yellow Gold 0.79 CTW
Located in New York, NY
GIA Certified Old Mine Cut Diamond Engagement Ring in 14K Yellow Gold 0.79 CTW PRIMARY DETAILS SKU: 101138 Listing Title: GIA Certified Old Mine Cut Diamond Engagement Ring in 14K Y...
Category

21st Century and Contemporary Diamond Solitaire Rings

Materials

Diamond, Yellow Gold

Art Deco Style Rubies Old Mine Cut Diamond Cocktail Ring
Located in Rome, IT
The chic setting is set with brilliantly white and vibrant natural diamonds as well as rich red custom cut natural rubies. Finished with dazzling diamonds and fine milgrain details, ...
Category

2010s Art Deco Diamond Solitaire Rings

Materials

Diamond, White Diamond, Ruby, 14k Gold

GIA Certified 1.50 Carat Pear Cut Diamond Blue Sapphire Halo Ring
Located in Rome, IT
An exquisite handmade blue sapphire halo with a main 1.50ct GIA certified pear cut diamond that offers vibrant sparkle, a completely eye clean appearance, bright white F color, and a...
Category

2010s Modern Diamond Solitaire Rings

Materials

Diamond, White Diamond, Blue Sapphire, 14k Gold

GIA Certified 3 Carat Emerald Cut Diamond Ideal Proportions VVS2
Located in Rome, IT
GIA Certified 3 Carat Emerald Cut Diamond Ideal Proportions VVS2
Category

2010s Modern Diamond Solitaire Rings

Materials

Diamond, White Diamond, Emerald, Platinum

Exceptional GIA Certified 4 Carat Fancy Orangy Pink Pear Cut Diamond Ring
Located in Rome, IT
An exquisite and unique GIA certified fancy orangy pink investment grade diamond the stone is exceptional plese inquire us we can send videos and pictures of this unique jewerly piece
Category

2010s Modern Diamond Solitaire Rings

Materials

Diamond, White Diamond, Pink Diamond, Platinum

Stacking Ring with Evil Eye Diamond Ring in 14K Yellow Gold
Located in Boston, MA
Diamond Evil Eye Ring in 14K Gold is a sign of pure love. For centuries, diamonds have been widely known as the universal symbol of eternal love and commitment. It's a statement ring...
Category

21st Century and Contemporary Modern Diamond Solitaire Rings

Materials

Diamond, Yellow Gold

GIA Certified 4 Carat Oval Diamond Solitaire Ring D Color
Located in Rome, IT
GIA Certified 4 Carat Oval Diamond Solitaire Ring An exquisite solitaire oval diamond with excellent proportions and very white diamond is D COLOR VS1 CLARITY!
Category

2010s Modern Diamond Solitaire Rings

Materials

Diamond, White Diamond, Platinum

GIA Certified 4 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

Australian 8.10ct Black Opal Ring with Diamonds, Platinum & 18ct Gold
Located in Brisbane, AU
Hand made platinum and 18ct yellow gold one of a kind ring featuring the most exquisite Australian Black Opal. Set with high quality E/Fsi diamonds down the band. Opal is solid and ...
Category

2010s Artist Diamond Solitaire Rings

Materials

Diamond, Opal, Black Opal, Gold, 18k Gold, Platinum

Tanzanite with Diamond Ring Set in 18 Karat White Gold Settings
Located in Bangkok, TH
Tanzanite 1.60 carats with Diamond 0.12 carat Ring set in 18 Karat White Gold Settings Width: 1.0 cm Length: 0.9 cm Ring Size: 53 Total Weight: 5.25 grams Tanzanite Width: 0.6 c...
Category

2010s Contemporary Diamond Solitaire Rings

Materials

Diamond, Tanzanite, 18k Gold, White Gold

7 Carat Vibrant Pink Mahenge Spinel Diamonds 18 Karat White Gold Dual Rings
Located in Yerevan, AM
One of a kind ring with beautiful Mahenge spinel from limited High Jewellery Embrace Collection by D&A This is a dual ring, which consists of 2 parts: The first part is a solitaire r...
Category

21st Century and Contemporary Contemporary Diamond Solitaire Rings

Materials

Diamond, Spinel, Gold, 14k Gold, 18k Gold, Rose Gold, White Gold, Yellow...

Tiffany & Co. Platinum Diamond .97Ct FVVS1 SolitairePrincess Cut Engagement Ring
Located in New York, NY
Tiffany & Co. Diamond Engagement ring featuring a princess cut 0.97 ct Center, graded F color , and VVS1 Clarity, in Platinum. This diamond Includes a GIA certificate with report ...
Category

21st Century and Contemporary Contemporary Diamond Solitaire Rings

Materials

Diamond, Platinum

GIA Certified 3.60 Carat Oval Brilliant Diamond Engagement Ring
Located in New York, NY
Leave it to ISSAC NUSSBAUM to create a masterpiece one of a kind setting for this magnificent 3.60 carat oval shaped diamond. This Diamond is unique for its perfect ratio giving off ...
Category

2010s Modern Diamond Solitaire Rings

Materials

Diamond, Platinum

Exceptional Flawless GIA Certified Fancy Intense Blue Pear Cut Diamond Pave Ring
Located in Rome, IT
An exceptional flawless pear cut fancy intense blue diamond certified by GIA
Category

2010s Modern Diamond Solitaire Rings

Materials

Diamond, White Diamond, Blue Diamond, Platinum

Tsavorite with Diamond Ring Set in 18 Karat White Gold Settings
Located in Bangkok, TH
Tsavorite 2.20 carats with Diamond 0.52 carat Ring set in 18 Karat White Gold Settings Width: 0.6 cm Length: 0.8 cm Ring Size: 51 Total Weight: 3.66 grams "We first opened doors ...
Category

2010s Contemporary Diamond Solitaire Rings

Materials

Diamond, Tsavorite, 18k Gold, White Gold

GIA Certified 4.01 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

Rainbow Blue Mystic Topaz Diamond Halo Ring White Gold
Located in Laguna Hills, CA
Mystic Topaz Diamond Halo Ring White Gold This sweet ring is stunning as the color sparkles with the radiance of blue in a tapestry cut stone. The stone is called a cushion .The ri...
Category

21st Century and Contemporary Contemporary Diamond Solitaire Rings

Materials

Diamond, Topaz, 10k Gold, White Gold

GIA Certified 8 Carat Radiant Cut Diamond Solitaire Ring
Located in Rome, IT
An exquisite GIA certified 8 carat radiant cut diamond set in solid platinum the diamond is extremely shiny with excellent proportions the ring has been handmade in Italy
Category

2010s Modern Diamond Solitaire Rings

Materials

Diamond, White Diamond, Platinum

Handcrafted Jolene Old European Cut Diamond Ring by Single Stone
Located in Los Angeles, CA
3.45ct L/VS1 GIA certified old European cut diamond prong set in a handcrafted 18K yellow gold and platinum mounting.
Category

21st Century and Contemporary Diamond Solitaire Rings

Materials

Diamond, Gold, 18k Gold, Yellow Gold, Platinum, Mixed Metal

2.90 Ctw Edwardian Diamond and Sapphire Ring 18 Karat White Gold
Located in Laguna Hills, CA
Edwardian Diamond and Sapphire Ring 18 Karat White Gold Circa's late 1800s-style ring consists of a round center diamond set in a 15.77 mm dome-shaped ring with blue sapphires. The ...
Category

20th Century Victorian Diamond Solitaire Rings

Materials

Diamond, Sapphire, 18k Gold, White Gold

GRS Pigeon Blood 0.96 Carat Burmese No Heat Ruby and Diamond Ring 18 Karat Gold
Located in Bangkok, TH
A brand new 0.96 carat Burmese ruby ring mounted with diamonds in 18 Karat gold. The ruby weighs 0.96 carat and is certified by Gem Research Swisslab (GRS) as natural, no heat, and '...
Category

2010s Diamond Solitaire Rings

Materials

Diamond, Ruby, Gold, 18k Gold, White Gold

Ruby with Diamond Ring Set in 18 Karat Gold Settings
Located in Bangkok, TH
Ruby 1.20 carats with Diamond 0.80 carat Ring set in 18 Karat Gold Settings Width: 1.0 cm Length: 0.5 cm Ring Size: 51 Total Weight: 6.93 grams "We first opened doors in 1980 whe...
Category

2010s Contemporary Diamond Solitaire Rings

Materials

Diamond, Ruby, Gold, 18k Gold

GIA Certified Emerald Cut Diamond Engagement Ring 0.74 Carat D/VS2
Located in London, GB
A classic 18k white gold diamond solitaire engagement ring. The ring is set to the centre with an emerald cut diamond weighing 0.74ct, colour D and VS2 clarity complemented by a roun...
Category

21st Century and Contemporary Diamond Solitaire Rings

Materials

Diamond, 18k Gold, White Gold

Mobee Pearl & Diamond Ring 1.45 Carat VS-F Quality
Located in Laguna Hills, CA
Mobee Pearl Ring expanding 22 mm wide with beautiful diamonds on this quality Modern ring. Quality diamonds radiate from this ring as it moves. 16 round brilliant cut diamonds are...
Category

21st Century and Contemporary Modern Diamond Solitaire Rings

Materials

Pearl, Diamond, 14k Gold, White Gold

GIA Certified 2.19 Carat Fancy Purple Pink Cushion cut Diamond Ring
Located in Rome, IT
GIA Certified 2.19 Carat Fancy Purple Pink Cushion cut Diamond Ring
Category

2010s Modern Diamond Solitaire Rings

Materials

Diamond, White Diamond, Pink Diamond, 18k Gold, White Gold, Yellow Gold

2.30 Carat Chocolate Diamond & Topaz Cushion Halo Ring, White Gold
Located in Laguna Hills, CA
Chocolate Diamond & Topaz Cushion Halo Ring, White Gold measuring 18 mm in diameter Center is a brilliant cushion cut brown colored topaz. The facets are 'tapestry' cut and radiant ...
Category

21st Century and Contemporary Contemporary Diamond Solitaire Rings

Materials

Diamond, Topaz, 14k Gold, White Gold

18k Rose and White Gold Curvy Contemporary Diamond Ring
Located in Palm Beach, FL
Crafted in 18 karat white and rose gold, this curvy open work design is totally tomorrow! So chic! A round white diamond appears to float effortlessly. Tension channel set. 0.64 ...
Category

Early 2000s Diamond Solitaire Rings

Materials

Diamond, 18k Gold, White Gold

Ruchi New York Paraiba Solitaire Ring
Located in New York, NY
Exclusive Collection, Solitaire ring with Paraiba with Diamond halo set in 18k white gold. Ring size 6.5 U.S. Paraiba: 2.93ct total weight. Diamond: 0.45ct total weight. All diamon...
Category

2010s Contemporary Diamond Solitaire Rings

Materials

Diamond, Paraiba, Gold, 18k Gold, White Gold

Emerald, Diamonds ,18 Karat White Gold Modern Ring
Located in Marcianise, Marcianise (CE)
SHIPPING POLICY: No additional costs will be added to this order. Shipping costs will be totally covered by the seller (customs duties included). Beautiful modern ring in 18 karat...
Category

2010s Modern Diamond Solitaire Rings

Materials

Diamond, Emerald, 18k Gold, White Gold

1 Carat Cushion Cut on Double Shank Solitaire Ring
Located in New York, NY
1.05 ct Cushion cut with E color and SI-1 clarity (GIA certificate upon request), is mounted on a solitaire made with not one, but two shanks. This 18kt white gold mounting also has...
Category

2010s Contemporary Diamond Solitaire Rings

Materials

Diamond, 18k Gold

24K Gold Hand Crafted Wide Weave Mesh Band Radiant Cut Diamond Solitaire Ring
Located in Istanbul, TR
24K Gold Handcrafted Wide Weave Mesh Band Radiant Cut Diamond Solitaire Ring Weight of Diamond : 0.75 ct's Weight of Gold : 20.98 Grams
Category

21st Century and Contemporary Artisan Diamond Solitaire Rings

Materials

Diamond, 24k Gold

GIA 2.04ctw Trillion Diamond Engagement Double Edge Halo Pave Platinum Ring
Located in New York, NY
GIA 2.04ctw Trillion Diamond Double Edge Halo Pave Platinum Engagement Anniversary Ring. The center is Trillion, Triangular Brilliant 1.48CT Center in J color, SI2 clarity (SUPER Br...
Category

Early 2000s Diamond Solitaire Rings

Materials

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

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