$4,797Sale Price|49% Off
GIA Certified 1.11ct Fancy Vivid Greenish Blue Diamond, Marquise, VVS2
Located in New York, NY
This marquise brilliant-cut diamond shimmers with a Fancy Vivid Greenish Blue color — an extraordinary hue reminiscent of tropical waters and glacial ice.
Blue Diamond
Rare Blue Diamond - 0.51ct Natural Loose Fancy Light Greenish Blue GIA VS1
Located in New York, NY
ITEM SPECIFICATION DIAMOND INFORMATION Retail Price - $32,800 Item Stock Number - 9859400022248 Certificate Number - GIA 3345439635 Shape - Cushion Carat Weight - 0.51ct Color - Fan...
Blue Diamond
$5,497Sale Price|60% Off
GIA Certified 1.43ct Fancy Vivid Greenish Blue Diamond, Emerald Cut, VS1
Located in New York, NY
A masterpiece of precision and color. This emerald-cut diamond glows with a mesmerizing Fancy Vivid Greenish Blue hue — a rare and enchanting tone that evokes the depth of the sea an...
Blue Diamond
$7,497Sale Price|49% Off
GIA Certified 1.35ct Fancy Vivid Greenish Blue Diamond, Emerald Cut, VS1
Located in New York, NY
A masterpiece of precision and color. This emerald-cut diamond glows with a mesmerizing Fancy Vivid Greenish Blue hue — a rare and enchanting tone that evokes the depth of the sea an...
Blue Diamond
GIA Certified 1.50 Carat Fancy Light Greenish Blue Cushion Cut Loose Diamond
Located in Miami, FL
GIA-certified 1.50 carat natural fancy light greenish blue diamond in cushion modified brilliant cut weighing with SI2 clarity.
Blue Diamond
$232,000Sale Price|20% Off
GIA Certified 2.03 Carat Fancy Light Greenish Blue Heart-Shaped Diamond Ring
Located in Chicago, IL
GIA Certified 2.03 Carat Fancy Light Greenish Blue Heart-Shaped Diamond Ring The centerpiece of this exquisite jewel is a heart-shaped diamond weighing 2.03 carats, certified by GIA...
Diamond, Blue Diamond, Platinum
Emilio Jewelry GIA Certified 2.50 Carat Fancy Intense Greenish Blue Diamond Ring
By Emilio!
Located in New York, NY
From the Emilio Jewelry Museum Vault, Showcasing a magnificent investment grade 2.50 carat Gia certified natural fancy intense greenish blue diamond set in the center.
Blue Diamond
GIA Certified 0.48 Carat Fancy Light Greenish Blue SI1 Clarity Diamond
Located in บางรัก, TH
Certificate: GIA Report Number: Fancy Light Greenish Blue Shape And Cut: Pear Carat Weight: 0.48 carat Measurements: 5.9 x 4.33 x 2.56 mm Color Grade: Fancy Light Greenish Blue FE...
Diamond
GIA Certified 0.43 Carat Fancy Light Greenish Blue VS2 Clarity Diamond
Located in บางรัก, TH
Certificate: GIA Report Number: 3375577178 Shape And Cut: Pear Carat Weight: 0.43 carat Measurements: 7.36 x 3.52 x 2.35 mm Color Grade: Fancy Light Greenish Bue FEATURES OF THE D...
Diamond
GIA Certified 0.43 Carat Fancy Light Greenish blue VS2 Clarity Diamond Ring
Located in บางรัก, TH
18kt white gold ring with diamonds Gold colour & karat: White gold 18kt Weight: 4.27 grams Set with- Stone type: Diamonds Shape: Pear Carat: 0.43 ct Colour: Fancy...
Diamond, 18k Gold, White Gold
Diamond Cluster Cocktail Ring with 3.51ct Fancy Brownish Greenish Yellow Cushion
Located in New York, NY
Cocktail Ring in 18K White & Rose Gold With GIA Certified 3.51ct Fancy Brownish Greenish Yellow Cushion VS1 GIA#5376889442 Small Round Diamonds - 101 stone totaling 0.39ct Pear Sh...
Diamond, Blue Diamond, 18k Gold, Rose Gold, White Gold
GIA Certified 1.39 Carat Cushion Natural Greenish Blue Diamond Engagement Ring
Located in Trumbull, CT
The center stone is a natural, fancy light greenish-blue VVS2 diamond. Meticulously crafted, this ring can also be converted into a pendant, offering versatile elegance.
Blue Diamond, 18k Gold
Emilio Jewelry Gia Certified Fancy Intense Blue Diamond Ring
By Emilio!
Located in New York, NY
This Fancy Intense Greenish Blue diamond ring with the main stone is clear and translucent, quite pleasing, and definitely an excellent investment choice.
Blue Diamond
18K White Gold Statement Ring With 0.50 Carat Fancy Coloured Diamond
Located in Ramat Gan, IL
This wording refers to the HPHT color enhancement and does not mean that the diamond is synthetic or lab-grown. A beautiful 0.50 ct Fancy Vivid Greenish Blue Shield (treated color) ...
Diamond, 18k Gold, White Gold
Handmade 18K Gold 2ct Marquise Brown Diamond Ring with Pavé By Joke Quick
By Joke Quick
Located in Antwerp, BE
One of a kind 2 Carat Marquise Fancy Greenish Brown, Cognac and blue pavé diamond ring.
Diamond, Yellow Diamond, Brown Diamond, Blue Diamond, 18k Gold
$3,298,439
X Glaciar Monach
Located in Stockholm, SE
Featuring a 1.07carat GIA-certified Fancy Light Greenish Blue diamond with VS1 clarity and no fluorescence, is exquisitely set amidst a cascade of 3,188 diamonds and sapphires.
Diamond, Blue Diamond, Yellow Diamond, Blue Sapphire, 18k Gold
2.24 Carat GIA Cert Natural Fancy Greenish Blue Diamond Platinum Ring
Located in Calabasas, CA
A magnificent 2.24ct Natural Fancy Light Greenish Blue Diamond Ring. The Greenish Blue center stone is set in Platinum surrounded by a halo of Natural Pink Diamonds melee to enhance ...
Blue Diamond, Diamond, Pink Diamond, Platinum
GIA Graded 0.95 Carat Fancy Light Greenish-Blue Diamond Internally Flawless Ring
Located in Warrington, PA
Outstanding Platinum and Diamond ring featuring a Gemological Institute of America Graded 0.95 carat Fancy Light Greenish-Blue Diamond Internally Flawless ring.
Diamond, White Diamond, Blue Diamond, Platinum
18K Rose Gold 0.90Ct Pink Diamonds 2.01 Ct Fancy Intense Greenish Blue HPHT Diam
Located in New York, NY
GLP0063 18k Rose Gold 4.3 grams 0.90Ct Pink Diamonds 2.01 Ct Fancy Intense Greenish Blue HPHT
GIA Certified .50 Natural Pink and .53 carat Natural Blue Diamond Platinum Ring
Located in Whippany, NJ
Accompanying the fancy pink diamond is a rare 0.56-carat natural fancy greenish-blue radiant diamond, certified by GIA with the reference number 6127746755.
White Diamond, Blue Diamond, Pink Diamond, Platinum
Unavailable
Diamond Gold Band Ring
Located in Berlin, DE
1980s. 5 rows of brilliant-cut fancy greenish blue intense diamonds of overall circa 5,24 carat.
Diamond, 18k Gold, White Gold
Alexander GIA 1.02 Carat Fancy Greenish Blue Diamond with Fancy Pink Diamonds
By Alexander Beverly Hills
Located in BEVERLY HILLS, CA
Exquisite and very rare fancy greenish blue diamond with Argyle fancy pink diamonds, GIA certified.
Blue Diamond, Pink Diamond, 18k Gold, Rose Gold
GIA Certified 0.44 Carat Fancy Greenish Blue SI2 Clarity Diamond
Located in บางรัก, TH
Certificate: GIA Report Number: 6385403870 Shape And Cut: Pear Carat Weight: 0.44 carat Measurements: 6.56 x 4.25 x 2.25 mm Color Grade: Fancy Greenish Blue FEATURES OF THE DIAMON...
Diamond
1.5ct Fancy Light Greenish Blue Diamond Earrings
By Rare Colors
Located in New York, NY
0.88 Carat GIA Fancy Light Bluish Green Radiant Cut VS2 Clarity 0.94 Carat GIA Fancy Light Greenish Blue Radiant Cut VVS2 Clarity Surrounded by Fancy Pink & White Diamonds Handset i...
Blue Diamond, 18k Gold
Sold
H 0.1 in W 0.17 in L 0.24 in
GIA Certified 0.45 Carat Fancy Light Greenish Blue VVS2 Clarity Diamond
Located in บางรัก, TH
Certificate: GIA Report Number: 2386282200 Shape And Cut: Pear Carat Weight: 0.45 carat Measurements: 6.07 x 4.21 x 2.39 mm Color Grade: Fancy Light Greenish Blue FEATURES OF THE D...
Diamond
GIA Certified 0.47 Carat Fancy light Greenish Blue VVS1 Clarity Diamond Ring
Located in บางรัก, TH
18kt white gold ring with diamonds Gold colour & karat: White gold 18kt Weight: 4.24 grams Set with- Stone type: Diamonds Shape: Pear Carat: 0.47 Colour: Fancy Li...
Diamond, 18k Gold, White Gold
GIA Certified Multi-Color Diamond Cocktail Ring
Located in Boca Raton, FL
GIA certified cushion cut 0.55ct fancy greenish blue diamond, GIA certificate #2175086037.
Diamond, White Diamond, Blue Diamond, Yellow Diamond, Pink Diamond, 18k ...
1.69 Carat Fancy Light Greenish Blue Diamond Two Color Gold Ring
By Tamir
Located in Beverly Hills, CA
An elegant 1.69ct G.I.A certified fancy light greenish blue radiant cut diamond ring.
Blue Diamond, Pink Diamond, Rose Gold, White Gold
1.60ct Colored Diamond Ring 14K Gold Fancy Yellow Greenish -
Located in Sant Josep de sa Talaia, IB
These are color-treated for enhanced intensity, yet remain natural diamonds in origin. Completing the design, two extraordinary Fancy Greenish Blue marquise-cut diamonds (0.80ct tot...
Diamond, 14k Gold
1.60ct Natural Fancy Greenish Blue Diamond Ring
Located in Chestnut Hill, MA
Platinum 3 stone ring consisting of 1 radiant cut natural blue diamond weighing 1.60 carats having a color and clarity of fancy light greenish blue/SI1 with GIA certificate #11429508...
Diamond, Platinum
GIA Certified White Gold Fancy Greenish Blue 1.52 ct Diamond & 2.74 ct Ring
By HY JEWELLERY
Located in Knightsbridge, GB
FANCY GREENISH BLUE DIAMOND RING - 4.26 CT Set in 18Kt White gold Total fancy diamond weight: 1.52 ct [ 1 diamond ] Color: Natural Fancy Light Greenish Blue Clarity: SI2 Total s...
White Diamond, Blue Diamond, Pink Diamond, 18k Gold
GIA Certified 2.76 Carat TW Radiant Natural Fancy Light Greenish Blue Diamonds
Located in New York, NY
Incredible Deal on Extremely Rare Pair of GIA Certified 2.76 Carat Total Weight Radiant Cut, Natural Fancy Light Greenish Blue, Even Color Diamonds.
Diamond, Blue Diamond
$732Sale Price|20% Off
0.75 CARAT MARQUISE BRILLIANT GIA CERTIFIED U to v RANGE SI2 CLARITY DIAMOND
Located in New York, NY
ITEM DESCRIPTION ID #: NYC56890 Stone Shape: MARQUISE BRILLIANT Diamond Weight: 0.75ct Clarity: SI2 Color: U to V Range Cut: Excellent Measurements: 8.26 x 4.73 x 3.25 mm Depth %: 68...
White Diamond
$700
W 0.48 in D 0.2 in L 0.38 in
Fine Natural Aquamarine Beryl 3.17 Carat – Madagascar – Collector Quality Gem
Located in Peshawar, PK
Experience the elegance of this natural Aquamarine gemstone, weighing an impressive 3.17 carats and sourced from the renowned gemstone regions of Madagascar. Known for its rich, deep...
Aquamarine
$1,300
W 0.52 in D 0.32 in L 0.38 in
Natural Aquamarine Gemstone: 7.88 Carat Emerald Cut Aquamarine Beryl
Located in Peshawar, PK
Hardness : 7.5-8 Origin : Pakistan Shape : Emerald Cut Color : Blue Clarity : SI Weight : 7.88 Carats Dimensions : 13 * 9.5 * 8 MM Treatment : Heat Family : Beryl This elegant Aq...
Aquamarine
$3,246Sale Price|35% Off
W 0.23 in D 0.14 in
GIA Certified 0.71ct Fancy Intense Blue Diamond, Round, VS2
Located in New York, NY
A breathtaking fusion of color and brilliance. This round brilliant-cut diamond dazzles with a Fancy Intense Blue hue, evenly saturated and full of life. Certified by the Gemological...
Blue Diamond
Natural Aquamarine Beryl Gemstone: 4.77 CT Emerald Cut
Located in Peshawar, PK
Hardness : 7.5-8 Origin : Madagascar Shape : Emerald Cut Color : Crystal Blue / Santa Maria Blue Clarity : SI Clean Treatment : Heat Family : Beryl This Aquamarine gemstone is a bea...
Aquamarine
Natural Light Blue Aquamarine 2.84ct Fancy Cushion Cut Loose Gem
By Gems and Jewels UK
Located in Birmingham, GB
Natural Light Blue Aquamarine 2.84ct Fancy Cushion Cut Loose Gem 9.7x6.8mm Natural Light Blue Aquamarine Gemstone. 2.84 Carat with a beautiful light blue colour and excellent clarit...
Aquamarine
Natural Aquamarine Beryl Gemstone: 2.11 CT Emerald Cut
Located in Peshawar, PK
Hardness : 7.5-8 Origin : Madagascar Shape : Emerald Cut Color : Crystal Blue Clarity : SI Clean Treatment : Heat Family : Beryl This aquamarine gemstone is a captivating member of...
Aquamarine
$4,556Sale Price|20% Off
GIA Certified 1.28 Ct Emerald Cut G VVS2 Loose Diamond 7.48 x 5.32 x 3.70 mm
Located in New York, NY
GIA REPORT NUMBER: 2235024336 Shape:Emerald Cut Measurements:7.48 x 5.32 x 3.70 mm Carat Weight:1.28 carat Color Grade:G Clarity Grade:VVS2 Depth:69.5% Table:75% Girdle:Extremely Thi...
Diamond
Blue Apatite Gemstone: Emerald Cut 0.96 CT December Birthstone
Located in Peshawar, PK
weight : 0.96 Carats Dimensions : 6.2 * 4 * 3.5 MM Treatment : Natural Cut : Emerald Clarity : VVS Hardness : 5 Origin : Madagascar Color : Neon Blue Use : For Making Jewelry This ...
Apatite
$192Sale Price|20% Off
W 0.25 in D 0.22 in L 0.38 in
Scintillating Sea-Blue Aquamarine 2.25 carats Emerald Cut Natural Pakistani Gem
Located in Bangkok, TH
Weight 2.25 carats Dimensions 9.4 x 6.3 x 5.35 mm Treatment Heated Origin Pakistan Clarity Eye Clean Shape Octagon Cut Emerald Elevate your jewelry collection with the mesmer...
Aquamarine
$100
W 0.21 in D 0.12 in L 0.18 in
Natural Neon Blue Apatite Gemstone: 0.65 Carat Emerald Cut December Birthstone
Located in Peshawar, PK
weight : 0.65 Carats Dimensions : 5.2*4.5*3 mm Treatment : Natural Cut : Emerald Hardness : 5 Origin : Madagascar Color : Neon Blue Use : For Making Jewelry This striking Apatite g...
Apatite
$80
W 0.26 in D 0.16 in L 0.22 in
Natural Neon Blue Apatite Gemstone: Emerald Cut 1.34 CT December Birthstone
Located in Peshawar, PK
weight : 1.34 Carats Dimensions : 6.500 * 5.500 * 4.000 MM Treatment : Natural Cut : Emerald Hardness : 5 Origin : Madagascar Color : Neon Blue Use : For Making Jewelry This captiv...
Apatite
Natural Aquamarine Beryl Gemstone: 2.74 CT Fancy Cut
Located in Peshawar, PK
Hardness : 7.5-8 Origin : Madagascar Shape : Fancy Cut Color : Crystal Blue Clarity : SI Clean Weight : 2.74 Carats Dimensions : 11 * 8.1 * 4 MM Treatment : Heat Family : Beryl Th...
Aquamarine
$100Sale Price|20% Off
W 0.2 in D 0.14 in L 0.25 in
0.95 carats Grayish Blue Spinel Stone Emerald Cut Natural Burmese Gemstone
Located in Bangkok, TH
Weight 0.95 carats Dimensions 6.3x5.0x3.4 mm Treatment none Origin Burma Clarity SI Shape octagon Cut emerald This exquisite 0.95 carats Grayish Blue spinel gemstone hails fr...
Spinel
Natural Aquamarine Beryl Gemstone: 3.16 Carat Fancy Cut
Located in Peshawar, PK
Hardness : 7.5-8 Origin : Madagascar Shape : Fancy Cut Color : Crystal Blue Clarity : VVS Clean Weight : 3.16 Carats Dimensions : 9 * 8 * 6.5 MM Treatment : Heat Family : Beryl Th...
Aquamarine
$800
W 0.32 in D 0.24 in L 0.36 in
Fine Natural Aquamarine Beryl 2.38 Carat – Madagascar – Collector Quality Gem
Located in Peshawar, PK
Experience the elegance of this natural Aquamarine gemstone, weighing an impressive 2.38 carats and sourced from the renowned gemstone regions of Madagascar. Known for its rich, blue...
Aquamarine
3.96 Carat Oval Aquamarine Diamond Three Stone Alternative Engagement Ring
By Merkaba Jewelry Beverly Hills
Located in Beverly Hills, CA
A rare and beautifully balanced 3.96 carat oval aquamarine platinum three stone alternative engagement ring by Merkaba Jewelry Beverly Hills, created as part of the Celestial Waters ...
Aquamarine, Diamond, White Diamond, Multi-gemstone, Platinum
0.92 TCW Yellow Cushion Diamond Loose Stones
Located in New York, NY
Weight: 0.2 Grams Stone: 0.92 TCW Yellow Diamond (0.30+ ct.) Measurements: 3.8 x 3.35 x 2.55 mm 3.6 x 3.3 x 2.85 mm 3.7 x 3.25 x 2.6 mm ITEM #: BR-1471-120424-03
Yellow Diamond
2.59 Carat Horizontal Custom Cut Aquamarine Diamond Platinum Cocktail Ring
By Merkaba
Located in Beverly Hills, CA
A refined and highly distinctive aquamarine and diamond cocktail ring handcrafted in platinum by Merkaba Jewelry Beverly Hills, centered by a 2.59 carat aquamarine with a rare custom...
Aquamarine, Beryl, Diamond, White Diamond, Multi-gemstone, Blue Diamond,...
Multi Strand Bead Emerald Necklace with Carved Drop Pendant
Located in New York, NY
Multi Strand Bead Emerald Necklace with Carved Drop Pendant This double-strand emerald necklace features deep green beads leading to a diamond-set clasp and pendant. The centerpiece...
Emerald, Gold, 18k Gold, White Gold, Platinum
7.55 Carat Peach Tourmaline Emerald Cut Platinum Diamond Ring By Merkaba
By Merkaba
Located in Beverly Hills, CA
A 7.55 carat peach tourmaline emerald cut platinum diamond ring, handcrafted by Merkaba Jewelry Beverly Hills as a romantic collector jewel and meaningful alternative engagement ring...
Diamond, Tourmaline, White Diamond, Emerald, Platinum
Vintage Sapphire and Diamond Convertible Tiara Necklace
Located in London, GB
A vintage sapphire and diamond convertible tiara necklace. An exceptional vintage sapphire and diamond convertible tiara and necklace set, in platinum, circa 1950. This beautifull...
Diamond, Sapphire, Platinum
5.03 Carat Royal Blue Sapphire Cushion Three Stone Platinum Engagement Ring
By Merkaba
Located in Beverly Hills, CA
A G.I.A certified 5.03 carat royal blue sapphire cushion cut platinum three stone ring, handcrafted by Merkaba Jewelry Beverly Hills as a refined collector jewel and meaningful alter...
Diamond, White Diamond, Multi-gemstone, Sapphire, Blue Sapphire, Platinum
Beauvince GIA H VS2 Certified 1.81 Ct Heart Shape Diamond Studs in White Gold
By Beauvince Jewelry
Located in New York, NY
Diamond solitaire studs are a signature everyday piece of jewelry. They are a classic and a statement simultaneously. This particular pair of Heart Shape Studs features a depth of ...
Diamond, 14k Gold, White Gold
$23,996Sale Price|20% Off
GIA 18k Yellow Gold Natural 3.01 Carat Radiant Cut Diamond Engagement Ring
By Raymond Lee Jewelers
Located in Boca Raton, FL
GIA 18k Yellow Gold Natural 3.01 Carat Radiant Cut Diamond Engagement Ring This exquisite GIA-certified 18k Yellow Gold engagement ring features a 3.01-carat radiant-cut diamond, co...
Diamond, Gold, 18k Gold, Yellow Gold
Cartier GIA Certified 13.46 Carats Oval Cut Yellow Diamond Engagement Ring
By Cartier
Located in New York, NY
An exquisite Cartier engagement ring, showcasing a vibrant 13.46 carats oval cut yellow diamond certified by GIA as Fancy Intense Yellow color and VS1 clarity, set on a classic four ...
Diamond, Yellow Diamond, 18k Gold, Yellow Gold
Georgian Boxed Woven Pearl Starburst Tiara, Circa 1780
Located in Altrincham, GB
A spectacular Georgian tiara, gorgeously crafted and fitted in a royal blue velvet box. Its composed of countless natural and seed pearls, I can't imagine you could count them all- a...
Pearl, Base Metal
GUCCI Limited Edition Exotic Lizard Satin Flora Print Horsebit Bag Clutch
By Gucci
Located in Switzerland, CH
RARE GUCCI FLORAL FLORA PRINT SIGNATURE HORSEBIT BAG DETAILS: A GUCCI signature piece that will last you for many years Timeless classic - a true beauty! Loved by many celebritie...
Vintage Platinum 1940s Aquamarine & Diamond Halo Cluster Ring
Located in Brighton, GB
Vintage Aquamarine Ring Platinum Tested Circa 1940’s Fabulous, vintage ring. Set with a gorgeous, faceted-cushion cut, natural aquamarine. Mounted in platinum, with a beautiful h...
Aquamarine, Diamond, Platinum
Late Victorian Opal and Diamond Tiara
Located in London, GB
A late Victorian opal and diamond tiara/necklace, consisting of seven knife-edge gold bars graduating from the centre, each set with two round cabochon-cut opals and an old-cut diamo...
Diamond, Opal, 18k Gold, Silver
On Hold|$450,000
W 0.45 in D 0.28 in L 0.52 in
6 Carat Paraiba Tourmaline Loose Gemstone, Oval Cut, Mozambique, GIA Certified
By Merkaba
Located in Beverly Hills, CA
Offered loose by Merkaba Jewelry Beverly Hills, this 6 carat Paraiba tourmaline from Mozambique is an extraordinary collector gemstone, presented in a refined oval cut and accompanie...
Tourmaline, Paraiba, 18k Gold, Rose Gold, White Gold, Yellow Gold, Platinum
GIA 2.02ct Royal Blue Sapphire Cushion Engagement Diamond Ring in Platinum
By Merkaba
Located in Beverly Hills, CA
GIA Certified 2.02 Carat Royal Blue Sapphire Cushion Platinum Engagement Ring with 0.99 Carat Cushion Diamonds and 1.20 Carats Round Brilliant Pavé – Merkaba Jewelry Beverly Hills C...
Blue Sapphire, Platinum
Antique diamond rings, diamond tiaras and dazzling vintage diamond earrings are on the wish lists of every lover of fine jewelry. And diamonds and 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 diamonds 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 the 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 diamond's 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 (taking the time to clean your diamond ring at least every six months or so plays a role in maintaining said beauty). And on 1stDibs, a range of buying guides can be found for those in the market for antique engagement rings, vintage engagement rings or Art Deco engagement rings.
Shop antique and vintage diamond rings, diamond necklaces and other extraordinary diamond jewelry on 1stDibs.