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Diamond Jewelry

2,382
158,119
655
to
24,804
110,192
31,650
338
3,151
38,832
116,435
1,254
2,586
1,868
1,758
1,546
1,529
103,035
53,704
2,035
134,354
73,597
56,964
42,090
35,910
158,774
28,585
31,933
16,761
16,775
62475
13558
12960
9564
6695
to
40,431
26,223
12,145
4,576
4,224
Gemstone: Diamond
Fancy Color Sapphires and Diamonds Cross Pendant in 14 Karat Gold
Located in Istanbul, TR
Cross pendant with fancy color sapphires and diamonds Weight: 1.2 g. Gold - 14k yellow gold Size - 22x12.5mm Stones: 1. Fancy color sapphires 6 pieces - round cut, green, pink, re...
Category

2010s Turkish Modern Diamond Jewelry

Materials

Diamond, Sapphire, 14k Gold

1.9 Carat Pear Cut Emerald and Diamond Drop Necklace in 18K Yellow Gold
Located in Houston, TX
Emerald Necklace in 18K Gold studded with pear cut emerald pieces and diamonds. Accessorize your look with this elegant emerald drop necklace. This stunning piece of jewelry instantl...
Category

21st Century and Contemporary Modern Diamond Jewelry

Materials

Diamond, Emerald, Yellow Gold

Star Asterism 2.53 CT Center Ruby Diamond 3.33 TCW Yellow Gold Engagement Ring
Located in Los Angeles, CA
Star Ruby (2.53 carat center) and diamond (0.8 total carat weight) antique inspired cocktail ring in 14k yellow gold. The ring is designed and handmade locally in Los Angeles by Sage...
Category

2010s Contemporary Diamond Jewelry

Materials

Star Ruby, Diamond, Ruby, Yellow Gold

Feather 0.6 Total Carat Diamond Yellow Gold Flexible Dangle Drop Earrings
Located in Los Angeles, CA
Diamond (0.6 total carat weight) feather shape flexible drop earrings in 14k yellow gold. The earrings are designed and handmade locally in Los Angeles by Sage Designs L.A. using ear...
Category

2010s Contemporary Diamond Jewelry

Materials

Diamond, Yellow Gold

GIA Certified Unheated Ruby and Diamond Chandelier Earrings, Pierre/Famille
Located in Aspen, CO
Unheated Natural Rubies set in platinum chandelier earrings, these vivid red rubies possessing GIA certificates which state that the fine matched rubies are unheated and untreated. T...
Category

21st Century and Contemporary Contemporary Diamond Jewelry

Materials

Diamond, Ruby, Platinum

14 Karat Gold Earrings Studs with Rubies and Diamonds. Ruby stud earrings
Located in Istanbul, TR
14 karat gold earrings studs with genuine rubies and diamonds. July birthstone. Metal: 14 karat gold Weight: 1.95 g. Size: 12 x 9.5 mm. Central stones: Genuine rubies: weight - 0.45...
Category

2010s Turkish Modern Diamond Jewelry

Materials

Diamond, Ruby, 14k Gold

Patek Philippe Nautilus Stainless Steel Watch 5712 Custom Diamond Set 23 Carats
Located in Carlsbad, CA
Brand: Patek Philippe 5712 Stainless Steel Custom Diamond Set 23 Carats ( Color: D-F, Clarity: VVS-VS )
Category

21st Century and Contemporary Swiss Contemporary Diamond Jewelry

Materials

Diamond, White Diamond, Steel, Stainless Steel

"Labyrinth, Double Loop" Bracelet by David Yurman
Located in Dallas, TX
From the Labyrinth, Double Loop collection, this 18 karat yellow gold and stainless steel, cuff bracelet has approximately 2.00 cts of round diamonds. A classic from David Yurman!
Category

21st Century and Contemporary Diamond Jewelry

Materials

Diamond, 18k Gold, Yellow Gold, Stainless Steel

Platinum Art Deco Diamond and Emerald Necklace
Located in DALLAS, TX
Platinum Art Deco necklace with 1.03 carat G/VS1 trillion center diamond, 1 carat total weight emeralds and .6 carat total weight brilliant round cut diamonds. 20" 18k white gold cha...
Category

Mid-20th Century Art Deco Diamond Jewelry

Materials

Diamond, Emerald, 18k Gold, Platinum

18K White Gold, Diamond and Turquoise Pendant Style Earrings
Located in Aspen, CO
Turquoise, diamond and 18K pendant style earrings. These long graceful earrings are 2 inches long with knife edge 18K white gold interspersed with fine white diamonds and terminatin...
Category

21st Century and Contemporary Contemporary Diamond Jewelry

Materials

Turquoise, Diamond, 18k Gold, White Gold

Tiffany & Co. Elsa Peretti Diamonds by the Yard Pendant Necklace in Platinum
Located in Webster, NY
Authentic Platinum Tiffany & Co. Elsa Peretti Diamonds by the Yard pendant, with original box. Diamond Carat Weight: .31CTW Diamond Cut: Round Brilliant Color: F Clarity: VS1 Metal...
Category

21st Century and Contemporary Diamond Jewelry

Materials

Diamond, Platinum

GIA Certified 4.51 Carat Brilliant and Trillion Diamonds Platinum Ring
Located in Miami, FL
This splendid 3 stone ring is timeless, classic and can easily become a family heirloom considering its quality design will stand the test of time. The 3 stones represent the past, t...
Category

21st Century and Contemporary American Modern Diamond Jewelry

Materials

Diamond, Platinum

Peridot, Diamond and Platinum Pendant Earrings
Located in Aspen, CO
Earrings in platinum possessing 20 cts., of natural fine bright green peridot with 3 cts of near colorless, very slightly included, well matched diamonds, (H), near colorless and ve...
Category

21st Century and Contemporary Contemporary Diamond Jewelry

Materials

Diamond, Peridot, Platinum

Alexander 0.88ct Illusion Set Diamond Pendant Necklace 18k White Gold
Located in BEVERLY HILLS, CA
Stunning illusion set diamond pendant necklace, with the look of a 3ct emerald cut diamond. Created by Alexander Beverly Hills. 0.88ct of an emerald cut and trapezoid cut diamonds. A...
Category

2010s American Modern Diamond Jewelry

Materials

Diamond, 18k Gold, White Gold

14 Karat Gold Earrings Studs with Rubies and Diamonds
Located in Istanbul, TR
14 karat gold earrings studs with genuine rubies and diamonds. Removable Jacket Stud Earrings. July birthstone. Different way wearable earrings studs: you can wear as solitaire rub...
Category

2010s Turkish Modern Diamond Jewelry

Materials

Diamond, Ruby, 14k Gold

Triple Butterfly Diamond Bracelet
Located in New York, NY
An exquisitely made Butterfly Pave Diamond Bracelet. 5.65 carats of colorless white VS round and marquise cut diamonds. Handmade in 18k white gold. 7 inch length.
Category

21st Century and Contemporary Diamond Jewelry

Materials

Diamond, 18k Gold

Vintage Tiffany and Co Art Deco Diamond and Sapphire Platinum on Gold Brooch
Located in New York, NY
Vintage Tiffany & Co Platinum with 14k yellow gold diamond and sapphire brooch An Art Deco brooch with four round bezel set light blue sapphires and diamonds Sapphires weighing appro...
Category

Mid-20th Century American Art Deco Diamond Jewelry

Materials

Diamond, Sapphire, Blue Sapphire, 14k Gold, Platinum, Gold, Yellow Gold

STUNNING GIA Certified 20 Carat Fancy Intense Yellow Radiant Diamond Ring VVS1
Located in Rome, IT
This breathtaking ring From Antinori di Sanpietro Roma features a 20-carat Fancy Intense Yellow Radiant Cut Diamond with GIA certificate. The center diamond is accompained by sides ...
Category

2010s Italian Modern Diamond Jewelry

Materials

Diamond, Yellow Diamond

Princess Blue Sapphire Round Diamond 5.6 TCW White Gold Tennis Bracelet
Located in Los Angeles, CA
Sapphire (3.75 total carat weight) and diamond (1.75 total carat weight) tennis bracelet in 18k white gold. The bracelet is designed and handmade locally in Los Angeles by Sage Desig...
Category

2010s Contemporary Diamond Jewelry

Materials

Diamond, Blue Sapphire, Sapphire, White Gold

Zambian Emerald Gemstone Stud Earrings Diamond 10 Karat White Gold Fine Jewelry
Located in IN
Item Code :- STE-1188A Gross Wt. :- 2.30 gm 10k White Gold Wt. :- 1.98 gm Diamond Wt. :- 0.62 Ct. Emerald Wt. :- 0.98 Ct.
Category

21st Century and Contemporary Modern Diamond Jewelry

Materials

Diamond, Emerald, 10k Gold, White Gold

GIA Certified 25 Carat Certified Heart Shape Diamond Ring D Color
Located in Rome, IT
GIA Certified 25 Carat Certified Heart Shape Diamond Ring the main stone weights 25 carats and has vvs1 clarity
Category

2010s Italian Modern Diamond Jewelry

Materials

Diamond, White Diamond, Platinum

JV Insardi 18kt Canary Gold Pave Diamond Cocktail Ring
Located in New York, NY
JV Insardi's "Assymetrical Continuum" 18kt yellow satin gold cocktail ring is an exceptional hand-carved ring. The sculptural curves are finely tuned with balance for the entire dia...
Category

21st Century and Contemporary Contemporary Diamond Jewelry

Materials

Yellow Diamond, Black Diamond, Brown Diamond, Diamond, White Diamond, 18...

Antique Onyx Cameo Diamond Pearl Necklace
Located in Chicago, IL
This superb Renaissance style antique diamond and seed pearl necklace features a black and white onyx (agate) cameo finely carved with a profile of a lady. The cameo is set in an or...
Category

Late 19th Century Antique Diamond Jewelry

Materials

Agate, Diamond, Natural Pearl

White Gold Stud Earrings
Located in Los Angeles, CA
These diamond earrings give the illusion of larger single diamond studs! In fact, each earring is comprised of a single princess cut diamond framed by 4 marquise cut diamonds. While ...
Category

21st Century and Contemporary American Artisan Diamond Jewelry

Materials

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

18K Yellow Gold Emerald Diamond Tennis Bracelet
Located in Houston, TX
Bracelets are worn to enhance the look. Women love to look good. It is common to see a woman rocking a lovely gold bracelet on her wrist. A gold gemstone bracelet is the ultimate sta...
Category

21st Century and Contemporary Modern Diamond Jewelry

Materials

Diamond, Emerald, Yellow Gold

Three Stone Emerald and Diamond Ring in 14K White Gold
Located in Houston, TX
Emerald ring in 14K Gold which perfectly goes with your personality and also helps you to improve your creativity. Designed with three emerald in center and halo of Clustered diamond...
Category

21st Century and Contemporary Modern Diamond Jewelry

Materials

Diamond, Emerald, White Gold

Real 1.90 Carat SI Clarity HI Color Diamond Dangle Earrings 14 Karat Yellow Gold
Located in IN
Item Code :- CNF-21052 Gross Wt. :- 6.29 gm 14k Yellow Gold Wt. :- 5.91 gm Diamond Wt. :- 1.90 Ct. Earrings Size :- 56 x 18 mm approx.
Category

21st Century and Contemporary Modern Diamond Jewelry

Materials

Diamond, 14k Gold, Yellow Gold

Eighteen Karat Rose Gold Asscher Shaped Diamond Eternity Band
Located in New York, NY
Eighteen karat rose gold asscher-shaped diamond eternity band 3.25 millimeter Asscher shaped diamonds weighing 2.15 carat Asscher cuts look similar to emerald cuts but are square, as...
Category

2010s Contemporary Diamond Jewelry

Materials

Diamond, Gold, 18k Gold, Rose Gold

14K White Gold Diamond Huggie Hoop Earrings
Located in Houston, TX
You shall need diamond hoop earrings to make a statement with your look. These earrings create a sparkling, luxurious look featuring round and baguette cut diamonds. If you love to g...
Category

21st Century and Contemporary Modern Diamond Jewelry

Materials

Diamond, 14k Gold, White Gold

Mario Buccellati 1980 Rubies and Diamonds Cuff Bracelet
Located in Crema, Cremona
Inspired by Italian Renaissance, this Mario Buccellati cuff bracelet epitomises the iconic Buccellati signature: the "traforato" technique - or the art of managing the absence of met...
Category

1970s Italian Renaissance Vintage Diamond Jewelry

Materials

Diamond, Ruby, 18k Gold

2.61 Carat Emerald Cut Blue Sapphire, Diamond Baguette White Gold 3-Stone Ring
Located in Los Angeles, CA
This emerald-cut blue sapphire and diamond ring will make a classic staple for any fine jewelry collection. Featuring a rich, velvety blue sapphire flanked by a white tapered baguett...
Category

21st Century and Contemporary American Artisan Diamond Jewelry

Materials

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

JV Insardi 18kt Rose Gold and Diamond Cocktail Ring
Located in New York, NY
JV Insardi's "Tiger Continuum" 18kt rose gold cocktail ring is a distinct hand-carved ring. The sculptural curves are finely tuned with balance for the entire diameter of the ring. ...
Category

21st Century and Contemporary Contemporary Diamond Jewelry

Materials

Diamond, White Diamond, Yellow Diamond, Black Diamond, Brown Diamond, Ro...

AJD 1.25 Carat Glittering Diamond Stud Earrings
Located in Tuxedo Park , NY
Sparkling, glittering Trillion Diamond Stud earring of approximately 1.25 carat total weight. These gorgeous Diamonds are set in 18K yellow gold and have friction backs. They are t...
Category

21st Century and Contemporary Artisan Diamond Jewelry

Materials

Diamond, 18k Gold

Ladies Diamond Jubilee Dial Rolex with Date-Just Wrist Watch, c. 2008
Located in Aspen, CO
Rolex Vintage Ladies Rolex wrist watch - 100% authentic and guaranteed to be Rolex. with the original fancy silver diamond jubilee dial, date-just with sweep second hand. Scratch ...
Category

Late 20th Century Contemporary Diamond Jewelry

Materials

Diamond, 18k Gold, Stainless Steel

Ancient Roman Cleopatra Half Coin Pendant in 22ct Yellow Gold and Diamonds
Located in Brisbane, AU
22ct gold ancient roman coin set with diamonds around the outer edge of the coin (FSI diamonds used) Roman emporer side and crocodile representing Cleopatra on the other Original ...
Category

2010s Artist Diamond Jewelry

Materials

Diamond, 22k Gold, Yellow Gold

Ruby and Diamond Earrings
Located in New York, NY
Certified Cushion cut Intense Red Ruby and Diamond Earrings. 13.13 carats of fine Ruby 4.10 carats of white round brilliant cut diamonds 18k white and yellow gold Approximat...
Category

21st Century and Contemporary Diamond Jewelry

Materials

Diamond, Ruby

GIA Natural Unheated Ceylon Sapphire 4.54 cts. & Diamond Antique Ring, c. 1920
Located in Aspen, CO
G.I.A. Sapphire displaying a rich royal endless blue color. The sapphire weighs exactly 4.54 cts., and found to be from Sri Lanka (Ceylon), and unheated. This means that the stone ...
Category

Early 20th Century Edwardian Diamond Jewelry

Materials

Diamond, Sapphire, 18k Gold, Platinum

Evil Eye Emerald Diamond Ring in 18 Karat White Gold
Located in Houston, TX
Emerald ring in 18K Gold which perfectly goes with your personality and also helps you to improve your creativity. Designed with a gemstone in center and halo of Clustered diamonds t...
Category

21st Century and Contemporary Modern Diamond Jewelry

Materials

Diamond, Emerald, White Gold

Large Antique Victorian Topaz Diamond Flower Brooch
Located in Chicago, IL
Circa 1840s A large antique early Victorian era brooch is superbly modeled as a stylized flower. The brooch is finely crafted in silver-topped gold and embellished with champagne co...
Category

Mid-19th Century Victorian Antique Diamond Jewelry

Materials

Diamond, Topaz

Diamond Art Deco Ring, c. 1935
Located in Aspen, CO
Diamonds set in a wide hand made ring. The 3 large European cut diamonds are accent with smaller diamonds. All of the diamonds are near colorless, (I) and very slightly included, (V...
Category

Mid-20th Century Retro Diamond Jewelry

Materials

Diamond, 14k Gold

Diamond Art Deco Greek Key Diamond Platinum Tiara
Located in Geneva, CH
Diamond tiara of Art Deco design, composed of graduated Greek key pattern and center medallion, set throughout with old mine cut diamonds on platinum. Design: Art Deco Period: 21th...
Category

21st Century and Contemporary Art Deco Diamond Jewelry

Materials

Diamond, Platinum

Large Oval Shaped Vivid Blue Sapphire and Diamond 7.20 Carat 18 Karat Gold Ring
Located in Tustin, CA
Magnificent estate large oval cut sapphire is prong set in 18 karat white gold and surrounded by prong-set baguette and round diamonds in a timeless and very elegant cocktail ring se...
Category

21st Century and Contemporary Contemporary Diamond Jewelry

Materials

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

Vintage Bvlgari Serpenti Diamond and Rubellite Snake Ring in 18k Rose Gold
Located in London, GB
An iconic vintage Bvlgari Serpenti ring set in 18k rose gold. The ring depicts Bvlgari's well-known serpent motif which wraps round the finger elegantly. It is comprised of a snake...
Category

2010s Unknown Modern Diamond Jewelry

Materials

Diamond, Rubelite, Gold, 18k Gold, Rose Gold

Victorian 1890s Diamond Gold Silver Necklace
Located in Los Angeles, CA
Victorian 1890s diamond necklace mounted in silver and gold. The delicate design is decorated on the front with open work diamond swags to a central motif featuring a flower suspendi...
Category

1890s Victorian Antique Diamond Jewelry

Materials

Diamond, 14k Gold, Gold, Silver

Diamond Cluster 18 Karat Gold Engagement Ring
Located in Frome, Somerset
Diamond Cluster 18 Karat Gold Engagement Ring. This divine engagement ring has been handmade in our workshops. It is made in 18ct gold and is embedded with full cut diamonds. The s...
Category

21st Century and Contemporary Contemporary Diamond Jewelry

Materials

Diamond, 18k Gold

Freedom Aquamarine brooch white gold Blue beryl 23 carats
Located in Berlin, DE
This imaginative Aquamarine and Diamond brooch features pure artistry inspired by the limitless beauty beyond our imagination, personal freedom, and ultimate happiness through devoti...
Category

2010s Aesthetic Movement Diamond Jewelry

Materials

Diamond, Aquamarine, Beryl, Crystal, White Gold, 18k Gold

1930s Art Deco 5.80 Carat Sapphire Diamonds Platinum 18 Karat White Gold Ring
Located in Poitiers, FR
Ring in platinum, mascaron hallmark, and 18 karat white gold, owl hallmark. Of oval shape, a light blue sapphire decorates the top surrounded by 8/8 cut and antique brilliant- cut di...
Category

1930s Art Deco Vintage Diamond Jewelry

Materials

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

Roman Malakov Yellow Radiant Cut Diamond Three-Stone Engagement Ring
Located in New York, NY
This platinum engagement ring showcases a gorgeous 2.02 carat elongated radiant cut diamond set in a four prong 18 karat yellow gold basket. GIA certified the center diamond as Fancy...
Category

21st Century and Contemporary American Contemporary Diamond Jewelry

Materials

Diamond, Yellow Diamond, 18k Gold, Platinum

Regal 9.90 Carat Natural Blue Sapphire and Diamond White Gold 2 Layer Band Ring
Located in Tustin, CA
Exquisite and very regal looking, 18 karat white gold estate sapphire and diamond double wide band ring features two rows of beautiful natural blue faceted oval shaped sapphires, eac...
Category

20th Century Artisan Diamond Jewelry

Materials

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

Alexis NY Diamond Ruby Pink Enamel Rose Gold Silver Snake Wrap Bracelet Watch
Located in New York, NY
Large 18k rose gold and sterling silver snake wrap bracelet, decorated with pink and white enamel, 1.10ctw in H/VS-Si1 diamonds and 0.56ctw rubies. Bracelet will fit approx. 6.5-7" w...
Category

21st Century and Contemporary Diamond Jewelry

Materials

Diamond, Ruby, Rose Gold, Silver, Enamel

Natural Australian 1.83ct Black Opal and Diamond Pendant Necklace 18K Rose Gold
Located in Sydney, AU
'Heaven’s Eye' is an elegant Australian opal pendant (1.83ct) framed by 29 diamonds and set in 18K rose gold. It’s the striking reds (the rarest and most valuable opal colour) that m...
Category

2010s Australian Contemporary Diamond Jewelry

Materials

Black Opal, Opal, Diamond, 18k Gold, Rose Gold

18K and Diamond Vintage Cuff Bracelet
Located in Aspen, CO
18K yellow gold bracelet possessing fine white brilliant cut diamonds. The pave set diamonds are estimated to weigh 6.5 cts., all are near colorless (H), and very slightly included ...
Category

21st Century and Contemporary Contemporary Diamond Jewelry

Materials

Diamond

Leon Megé Three-Stone Ring with Asscher-Cut Diamond and Diamond Bullets
Located in New York, NY
Leon Megé bespoke three-stone engagement ring unmatched by other pairings and featuring an Asscher-cut diamond of graceful beauty. 1.83 ct Asscher cut natural diamond Elongated diam...
Category

2010s American Contemporary Diamond Jewelry

Materials

Diamond, Platinum

Stunning 8.00 Carat Diamond Four Row X Design Wide 18 Karat White Gold Band Ring
Located in Tustin, CA
Very elegant and stunning, custom made 18 karat white gold, wide four row "X" design band ring features individual rows of sparkling white baguette cut diamonds invisibly set and sep...
Category

21st Century and Contemporary Modern Diamond Jewelry

Materials

Diamond, White Diamond, White Gold, 18k Gold

Heart Shaped Diamond and Ruby, White Gold Dangling Drop Earrings
Located in Los Angeles, CA
These pretty drop earrings feature sparkling heart-shaped diamonds, sleek tapered diamond baguettes and sparkling rubies set in 18k white gold. The heart shaped diamonds make these e...
Category

21st Century and Contemporary American Artisan Diamond Jewelry

Materials

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

Stylish Fine Natural Colombian Emerald and Diamond Ring
Located in Brunswick, ME
Emeralds Maravellous Stylish Fine AAA Natural Colombian Emerald and Diamond Ring Colombian emerald 1.50 carats- VS, Vivid Medium Green set with Natural Brilliant Cut Diamonds Approx....
Category

21st Century and Contemporary American Contemporary Diamond Jewelry

Materials

Diamond, Emerald, 18k Gold, White Gold

18k Gold Diamond Lotus Necklace Meditation Necklace Floral Necklace
Located in Bangkok, TH
Diamond Lotus Necklace made of 18k solid gold available in three colors, White Gold / Rose Gold / Yellow Gold. Natural genuine round cut diamond each diamond is hand selected by me ...
Category

21st Century and Contemporary Modern Diamond Jewelry

Materials

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

Dana David 18 Karat Yellow Diamond Leather Necklace
Located in Cincinnati, OH
This is a classic Dana David necklace. 18 karat yellow gold clasp and pendant. Pendant is approximately 1" diameter round with 9 round diamonds. .09tdw Brown leather necklace with...
Category

Early 2000s Diamond Jewelry

Materials

Diamond, 18k 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 “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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