Skip to main content

Diamond Jewelry

144,387
577
to
20,423
1,427
Item Location
101,127
30,458
272
3,367
36,844
104,487
1,195
2,488
1,751
1,565
1,470
1,406
93,210
49,863
1,920
122,283
68,890
50,793
37,186
30,781
144,993
25,880
30,271
14,301
15,328
56956
11391
11011
8371
5802
to
36,263
22,670
10,250
4,346
4,049
Gemstone:Diamond
18K White Gold Emerald and Diamond Brooch
Located in Boston, MA
Add a dash of class and update your outfit with this stunning emerald brooch made with beautiful intricate detail. This is a handmade piece which is encrafted using high quality mate...
Category

21st Century and Contemporary Modern Diamond Jewelry

Materials

Diamond, Emerald, White Gold

Burmese unheated Ruby Pigeon Blood Color And Diamond Earring In 18k Gold
Located in Melbourne, AU
4.08ct Burmese unheated Pigeon Blood Ruby and Diamond Earring in 18k Gold Total Ruby weight is 4.08ct Total Natural Diamond Weight is 1.402ct, The Colour of the Diamond is Approxim...
Category

2010s Contemporary Diamond Jewelry

Materials

Diamond, Ruby, 18k Gold

Vintage GIA Antique D Color Cushion Cut Diamond 18 Karat Gold Engagement Ring
Located in Beverly Hills, CA
One Vintage GIA Antique D Color Cushion Cut Diamond 18 Karat Yellow Gold Solitaire Engagement Ring. Featuring one GIA certified 0.95 carats old mine cut diamond accompanied with cert...
Category

1990s Diamond Jewelry

Materials

Diamond, 18k Gold, Yellow Gold

Burma Ruby No Heat GIA and Diamond Platinum Ring Estate Fine Jewelry
Located in Montreal, QC
Simply Beautiful! Finely detailed Awesome Platinum Ring, center securely nestled with an Oval Burma Ruby weighing approx. 1.08 Carat. GIA lab report #2195974816, stating Burma origin...
Category

21st Century and Contemporary Modern Diamond Jewelry

Materials

Diamond, Ruby, Platinum

Yoko London Freshwater Pearl and Diamond Choker Necklace in 18K Yellow Gold
Located in London, GB
The Yoko London collection's comprise of wearable works of art which showcase the high-quality craftsmanship and innovative design that have become synonymous with the fine jewellery...
Category

2010s Modern Diamond Jewelry

Materials

Diamond, Pearl, Freshwater Pearl, 18k Gold, Yellow Gold

Victorian Sterling Silver and 18K Gold Moonstone and Diamond Statement Ring
Located in Addison, TX
This flora inspired beauty is an excellent example of the Victorian era. Crafted in 18K yellow gold and sterling silver for the two tone look this piece is in great condition conside...
Category

Early 1900s Victorian Antique Diamond Jewelry

Materials

Diamond, Moonstone, 18k Gold, Sterling Silver

6.75 Carats Sapphire and 2 Carats Diamonds French Vintage Ring
Located in Saint-Ouen, FR
One very beautiful ring, made in France circa 1950. The central sapphire is big, 6.75 carats and has intense blue color, the clarity is very good. It is certified from Ceylan ans No ...
Category

1950s Vintage Diamond Jewelry

Materials

Diamond, Sapphire

1900 Victorian 1.30 Carats Ruby Diamond 14 Karat Gold Toi Et Moi Ring
Located in Philadelphia, PA
Bypass style ring featuring a double stone motif is the Toi et Moi style - French to mean 'You and Me' With an old mine cut diamond weighing approximately 0.55 carat with K color an...
Category

Early 1900s Victorian Antique Diamond Jewelry

Materials

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

6.64 Carat Oval Cut Orange Sapphire and Diamond Halo Engagement Ring
Located in New York, NY
Showcasing a color-rich oval cut orange sapphire weighing 6.64 carats, surrounded by a single row of brilliant marquise cut diamonds set in a flower design halo. Diamonds weigh 2.42 ...
Category

21st Century and Contemporary Contemporary Diamond Jewelry

Materials

Sapphire, Diamond, 14k Gold, Platinum

Egyptian Revival Necklace with Diamonds, Rubies, Sapphires and Emerald, c. 1920
Located in Aspen, CO
Egyptian revival pendant necklace, silver topped 18K gold and centering a scarab studded with natural rubies. Lotus motifs set with rose cut diamonds and cabochon cut natural sapphi...
Category

Early 20th Century Art Deco Diamond Jewelry

Materials

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

Black Bakelite, Diamond, Emerald and Sterling Silver Bracelet
Located in Nantucket, MA
A close fitting fascinating bracelet of black bakelite bordered with pave` set diamonds in sterling silver. The top features more pave`-set diamonds, two rose-cut diamonds and a cen...
Category

21st Century and Contemporary Diamond Jewelry

Materials

Diamond, Emerald, Sterling Silver

12.30 Carat Diamond 14 Karat White Gold Snow flake Chandelier Earrings
Located in Hoffman Estate, IL
Cast from 14-karat gold, these stunning earrings are hand set with 12.30 carats of sparkling diamonds. Available in Rose, white and yellow gold. FOLLOW MEGHNA JEWELS storefront to v...
Category

21st Century and Contemporary Contemporary Diamond Jewelry

Materials

Diamond, Gold, 14k Gold, White Gold

Fantastic Emerald and Diamond Brooch in Platinum and 18 Karat Gold by Meister
Located in Lucerne, CH
This fantastic flower brooch from the house of Meister captivates with its vibrancy and bright colours. The highly respected jeweller was founded in Zurich back in 1881 and is still ...
Category

1960s Artist Vintage Diamond Jewelry

Materials

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

GIA Certified 8.20 Carat Emerald Cut Diamond Eternity Band
Located in New York, NY
Exquisite emerald cut eternity band. 16 individually GIA certified emerald cut diamonds weighing 8.20 carats ,make up this magnificent ring. Diamonds are colorless (D E F) and clari...
Category

2010s Modern Diamond Jewelry

Materials

Diamond, Emerald, Platinum

Yellow Gold and Diamond Spike Earrings
Located in New York, NY
Very cool and unusual 18 Karat Yellow Gold and Diamond Spike earrings Approx 7.56 ct of Diamonds
Category

2010s Modern Diamond Jewelry

Materials

Diamond, Yellow Gold

Diamond Gold Earrings
Located in Geneva, CH
Earrings in 18kt white, yellow and pink gold set with 132 diamonds 2.22 cts
Category

21st Century and Contemporary Contemporary Diamond Jewelry

Materials

Diamond, Rose Gold, White Gold, Yellow Gold, Gold

Fancy Color Diamonds 21-22k Gold Dangle Lever-Back Earrings Wedding Jewelry
Located in New York, NY
Jaipur dangle lever-back earrings. Colorful rose and brilliant cut diamonds are bezel set in 21K gold. The warm colorful sparkle of the diamonds' contrasts the architectural elegance...
Category

21st Century and Contemporary Artist Diamond Jewelry

Materials

Diamond, White Diamond, Yellow Diamond, Brown Diamond, Pink Diamond, Yel...

Natural Opal Diamonds Ring 14K White Gold, 1950
Located in Herzelia, Tel Aviv
Natural Opal Diamonds Ring. The 1950s, 14K gold. This classic fifties ring is all about the scintillating 15 Сarat cabochon opal. Displaying green, blue, orange, and red in varying ...
Category

Mid-20th Century Diamond Jewelry

Materials

Diamond, Opal, White Gold

Edwardian Inspired Cabochon Emerald and Rose Cut Diamond Necklace
Located in Granada Hills, CA
18 Karat Yellow Gold, 2.01 CT Emerald Cabochon Center, 2.6ct Rose Cut Diamonds, and Silver Patina. Inspired by the Edwardian Era, a time when fine jewelry was a crucial component of ...
Category

2010s Edwardian Diamond Jewelry

Materials

Emerald, Diamond, Silver, 18k Gold

GIA Certified 11.66 Carat Emerald Cut Diamond Eternity Band
Located in New York, NY
Exquisite emerald cut eternity band. 16 individually GIA certified emerald cut diamonds weighing 11.66 carats , make up this magnificent ring. Diamonds are colorless (D E F) and cla...
Category

2010s Modern Diamond Jewelry

Materials

Diamond, Platinum

Antique GIA 3.65 Carat Old European Cut Diamond Platinum Engagement Ring
Located in Beverly Hills, CA
One Antique GIA 3.65 Carat Old European Cut Diamond Platinum Engagement Ring. Featuring one GIA certified 3.65 carat old European cut diamond accompanied with certificate #2215971302...
Category

1910s Edwardian Vintage Diamond Jewelry

Materials

Diamond, Platinum

3.1 Ct Emerald and Diamond Earring in 18k Yellow and White Gold
Located in Melbourne, AU
The pair of earring is consist of 4 Pieces of Pear shape Brilliant cut Vivid Green Emerald with the total weight of 3.1 ct Total natural diamond weight is 0.656 ct , The Colour of ...
Category

2010s Contemporary Diamond Jewelry

Materials

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

Retro GIA 3.78 Carat Diamond Platinum Solitaire Engagement Ring
Located in Beverly Hills, CA
One Retro GIA 3.78 Carat Diamond Platinum Solitaire Engagement Ring. Featuring one GIA certified 3.78 carat old European cut diamond accompanied with certificate #2346061913 stating ...
Category

1950s Retro Vintage Diamond Jewelry

Materials

Diamond, Platinum

5.55 Carats Total Baguette, Marquis and Round Diamond and Platinum Brooch F-G/VS
Located in Scottsdale, AZ
Featured here is an absolute showstopper of a brooch! Exquisite, icy white diamonds dazzle brilliantly throughout every inch of this piece. Made of polished platinum, this clustered ...
Category

20th Century Contemporary Diamond Jewelry

Materials

Diamond, Platinum

Art Deco GIA Certified 0.50 Carat Diamond Ruby Platinum Engagement Ring
Located in Hong Kong, HK
This ring features a GIA certified diamond weight 0.50 carat, F color, VS 1 clarity with excellent cutting. The center diamond is surrounded by natural ruby halo weight 1.18 carat. D...
Category

21st Century and Contemporary Art Deco Diamond Jewelry

Materials

Diamond, Ruby, Platinum

Carved Jade with Diamond Pendant Set in 18 Karat Gold Settings
Located in Bangkok, TH
Jade 46.47 carats with Diamond 0.23 carat Pendant set in 18 Karat Gold Settings (chain not included) Width: 2.1 cm Length: 5.0 cm Total Weight: 12.5 grams "We first opened doors ...
Category

2010s Art Deco Diamond Jewelry

Materials

Diamond, Jade, Gold, 18k Gold

Rainbow Sapphire Diamond Hoop Earrings in 14 Karat Yellow Gold
Located in Hong Kong, HK
This earrings feature 10.62 carats of emerald cut rainbow sapphires, assented with 2 rows of white round diamonds weight 1.34 carats. Earrings are made with 14 karat yellow gold. It ...
Category

21st Century and Contemporary Contemporary Diamond Jewelry

Materials

Diamond, Sapphire, 14k Gold, Yellow Gold

Nova F Round Diamond with Sapphire Art Deco Style Pendant in 18K White Gold
Located in Bangkok, TH
An Art Deco style diamond and sapphire pendant made with 18K white gold. The center diamond is a 0.25 Carat round cut of exceptional brightness. It is surrounded by sapphires that ar...
Category

21st Century and Contemporary Art Deco Diamond Jewelry

Materials

Diamond, Sapphire, 18k Gold, White Gold

Art Deco GIA Certified 0.50 Carat Diamond Sapphire Platinum Engagement Ring
Located in Hong Kong, HK
This ring features a 0.50 carat round brilliant cut diamond at the center (Color: E, Clarity: Internally Flawless, Cut: Very Good). Assented with 0.98 carat of natural sapphires halo...
Category

21st Century and Contemporary Art Deco Diamond Jewelry

Materials

Diamond, Sapphire, Platinum

Cartier Tank Americaine Ladies Watch in Diamonds & 18 K Rose Gold
Located in London, GB
Tank Américaine watch, small model, quartz movement. 18 karat gold case set with round-cut diamonds, 18K rose gold faceted crown set with a diamond, silvered flinqué dial, Roman nume...
Category

2010s Modern Diamond Jewelry

Materials

Diamond, 18k Gold, Rose Gold

Vintage Carved Jade Buttons on Diamond Hoop White Gold Earrings
Located in New York, NY
A vintage pair of triangle carved jade buttons Old Chinese natural apple jade carvings and diamonds earrings Hand assembles and handmade into 14 Karat white gold diamond hoop drop ea...
Category

2010s Contemporary Diamond Jewelry

Materials

Diamond, Jade, Gold, 14k Gold, White Gold

Art Nouveau White Diamond Garnet Turquoise Yellow Gold "Octopus" Cocktail Ring
Located in Naples, IT
This Ring is made of 14K Yellow Gold. This Ring has 0.12 Carats of White Brilliant Cut Diamonds. This Ring has 1.00 Carats of Garnets. This Ring has also Turquoise and Enamel. Size ...
Category

21st Century and Contemporary Modern Diamond Jewelry

Materials

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

DiamondTown 11.93 Carat Vivid Blue Sapphire and Diamond Bracelet
Located in New York, NY
(DiamondTown) This bracelet features 37 hand selected graduated oval cut Vivid Blue Sapphires (total weight 11.93 carats) surrounded by round cut diamonds (total diamond weight 1.95 ...
Category

21st Century and Contemporary Contemporary Diamond Jewelry

Materials

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

18K Yellow Gold "Intuition" Octopus Necklace with Aquamarine and Diamond accents
Located in New Cannan, CT
This Monica Rich Kosann 18K Yellow Gold Octopus pendent highlights the clever, highly intelligent, and creative intuitive creatures. The octopus is wrapped around an included Aquamar...
Category

2010s Contemporary Diamond Jewelry

Materials

Aquamarine, Diamond, 18k Gold, Yellow Gold

Van Cleef & Arpels Vintage Alhambra Diamond Bracelet
Located in New York, NY
Authentic Van Cleef & Arpels Vintage Alhambra bracelet crafted in 18 karat white gold and set with approximately 0.08 carats of round brilliant cut diamonds. The bracelet will fit up...
Category

2010s Diamond Jewelry

Materials

Diamond, 18k Gold, White Gold

18Karat Gold Amethyst 0.16 Karat White Diamonds Black Diamond Bees Stud Earrings
Located in Rome, IT
18 Karat Yellow Gold Amethyst 0.16 Karat White Diamond 0.18 Karat Black Diamonds Bees a pair of Bees Stud Earrings handcrafted in 18 Karats Yellow Gold and adorned with a deep viole...
Category

2010s Artisan Diamond Jewelry

Materials

Amethyst, Diamond, White Diamond, Black Diamond, White Gold, Gold, 18k G...

Vintage 14 Karat Diamond Gem Set Harem Ring
Located in New York, NY
A charming vintage 14k yellow gold harem ring set with sapphires, emeralds, diamonds, turquoise and rubies, circa 1970. This harem ring is so called based upon Victorian depictions a...
Category

1970s Modern Vintage Diamond Jewelry

Materials

Diamond, 14k Gold

18kt White Gold and Diamond Cluster Earrings
Located in Firenze, IT
Cluster round and baguette diamond approximately 4,5ct Diameter 15mm Weight: 6,7gr.
Category

1950s Retro Vintage Diamond Jewelry

Materials

Diamond, 18k Gold, White Gold

Van Cleef & Arpels Perlée Diamonds Bracelet, Medium Model
Located in New York, NY
Authentic Van Cleef & Arpels 'Perlée' bracelet crafted in 18 karat white gold features a single row of high-quality round brilliant cut diamonds weighing an estimated 2.16 carats tot...
Category

2010s Diamond Jewelry

Materials

Diamond, 18k Gold, White Gold

Turquoise, Emerald and Diamond Contemporary Bracelet in Yellow Gold
Located in Porto, PT
Rosior by Manuel Rosas Bracelet in 19.2K Gold and set with the following: - 59 Pear and Round Cut Cabochon Turquoises with 64,82 ct; - 1343 White Diamonds with 6,72 ct; - 81 Emeralds...
Category

21st Century and Contemporary Contemporary Diamond Jewelry

Materials

Diamond, Emerald, Turquoise, Gold, Yellow Gold

Gucci Diamond Logo Signature Signoria 18-K Yellow Gold Watch, High Jewelry
Located in London, GB
Gucci signature Signoria watch in 18 karats yellow gold watch with diamonds, quartz movement, Sapphire Crystal. This watch will ensure that all eyes are on you. 44 x round brilliant ...
Category

Early 2000s Modern Diamond Jewelry

Materials

Diamond, 18k Gold, Yellow Gold

GIA Certified 10.33 Carat Emerald Cut Diamond Eternity Band
Located in New York, NY
Exquisite emerald cut eternity band. 17 individually GIA certified emerald cut diamonds weighing 10.33 carats ,make up this magnificent ring. Diamonds are colorless (D E F) and clar...
Category

2010s Modern Diamond Jewelry

Materials

Emerald, Diamond, Platinum

Rosior one-off Diamond, Sapphire and Emerald Contemporary "Echarpe" Earrings
Located in Porto, PT
Rosior by Manuel Rosas Contemporary "Echarpe" Earrings set in 19.2 Karat Yellow Gold with: - 309 Green Diamonds with 2,81 ct, - 269 Yellow Diamonds with 3,40 ct, - 96 Emeralds with 1...
Category

21st Century and Contemporary Contemporary Diamond Jewelry

Materials

Pink Sapphire, Diamond, Yellow Diamond, Emerald, Sapphire, Gold, Yellow ...

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

GIA Certified 2.87 Carat Diamond Three-Stone Platinum Ring
Located in Stamford, CT
Three-stone diamond engagement ring. Old mine cushion cut center stone with two oval old mine cut side diamonds set in a platinum three-stone setting. Raised table cut tops shape and...
Category

Early 20th Century Diamond Jewelry

Materials

Diamond, Platinum

Flawless GIA Certified 13 Carat Round Brilliant Cut Diamond Ring
Located in Rome, IT
triple excellent cut none fluorescence please check the video the diamond is white!
Category

2010s Modern Diamond Jewelry

Materials

Diamond, White Diamond

18 Karat Rose Gold Ruby and Diamond Heart Pendant Invisible Setting
Located in Bangkok, TH
One heart for life .This is the new collection of "La Fleur Jewels" For this new collection we will fix the price and after deduct the cost .One part of profit will donate to the hos...
Category

21st Century and Contemporary Modern Diamond Jewelry

Materials

Diamond, Ruby, 18k Gold, Rose Gold

Van Cleef & Arpels Yellow Gold 1.05 Carat Diamond Ring
Located in New York, NY
Authentic Van Cleef & Arpels ring crafted in 18 karat yellow gold and set with a GIA certified 1.05 carat round brilliant cut diamond (F color, VVS1 clarity). The classic design is c...
Category

1990s Diamond Jewelry

Materials

Diamond, 18k Gold, Yellow Gold

Sapphire Ballerina Brooch 18 Karat White Gold in Invisible Setting
Located in Bangkok, TH
This is the master piece design by La Fleur Jewels .We are proudly to present the most beautiful brooch in the motion of ballerina. We use the top quality sapphire which make in invi...
Category

21st Century and Contemporary Modern Diamond Jewelry

Materials

Blue Sapphire, Diamond, 18k Gold, White Gold

Large Pear Shaped Natural Persian Turquoise and Diamond 18 Karat Cocktail Ring
Located in Tustin, CA
Stunning and totally dazzling, 18 karat white gold natural Persian turquoise and diamond cocktail ring features a 4.06 carat intense "Robins Egg Blue" pear shaped Persian turquoise i...
Category

21st Century and Contemporary Contemporary Diamond Jewelry

Materials

Turquoise, White Diamond, 18k Gold, White Gold

2.5 Carat Aquamarine and Diamond Ring in 18 Karat White Gold
Located in Hong Kong, HK
This collection features an array of aquamarines with an icy blue hue that is as cool as it gets! Accented with diamonds these rings are made in white gold and present a classic yet ...
Category

21st Century and Contemporary Contemporary Diamond Jewelry

Materials

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

Cynthia Scott Jewelry 10.52 Carat Tanzanite in 18 Karat Gold Ring
Located in Logan, UT
Tanzanite is among the most romanticized of modern gemstone discoveries, and the exceptional example showcased in this custom ring is a perfect reminder of why. This 10.52ct tanzani...
Category

21st Century and Contemporary Diamond Jewelry

Materials

Diamond, Tanzanite, Yellow Gold, 18k Gold, Gold

South Sea Pearl, Blue Sapphire and Diamond Pendant in 18k Gold
Located in Melbourne, AU
A 16.7 mm White South Sea Pearl, Blue Sapphire and Diamond Pendant in 18k Gold It consists of A 16.7mm White South Sea Pearl with Excellent Lustre and very minor surface Blemishes To...
Category

2010s Contemporary Diamond Jewelry

Materials

Diamond, South Sea Pearl, Blue Sapphire, 18k Gold, White Gold

Van Cleef & Arpels Diamond Two Row Long Necklace
Located in New York, NY
VAN CLEEF & ARPELS Diamond Two Row Long Necklace An 18k yellow gold two row long necklace, set with brilliant-cut diamonds. total length approx. 31.50″ long Signed “Van Cleef & Arpel...
Category

1980s Vintage Diamond Jewelry

Materials

Diamond, 18k Gold

Art Deco 1.15Ct Old European Cut GIA Certified Vintage Solitaire Engagement Ring
Located in Addison, TX
This little art deco beauty is right out of the roaring 20's. Reminiscent of something a flapper or Great Gatsby character may wear. This ring has simple elegant beauty, with enough ...
Category

1920s Art Deco Vintage Diamond Jewelry

Materials

Diamond, Platinum

GIA Certified 13.55 Carat Emerald Cut Diamond Eternity Band
Located in New York, NY
Exquisite emerald cut eternity band. 15 individually GIA certified emerald cut diamonds weighing 13.55 carats , make up this magnificent ring. Diamonds are colorless (D E F) and cla...
Category

2010s Modern Diamond Jewelry

Materials

Diamond, Emerald, Platinum

Shimmering Spray of Pearls, Leaves and Diamonds 14 Karat Yellow Gold Brooch Pin
Located in Tustin, CA
Very flowing, three dimensional, cluster of lustrous ivory tone pearls with leaves design vintage estate brooch pin is depicted in 14 karat yellow gold. It is accented with rows of w...
Category

20th Century Diamond Jewelry

Materials

Diamond, Pearl, 14k Gold, Yellow Gold

Ravishing 5.25 Carat Diamond Ballerina Center Scalloping Design 18k Gold Ring
Located in Tustin, CA
Ravishing 18 karat white gold diamond cocktail ring features a slightly domed rectangular shaped ballerina center with an array of diamonds in the middle creating an illusion of an e...
Category

21st Century and Contemporary Contemporary Diamond Jewelry

Materials

Diamond, White Diamond, 18k Gold, White 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.