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Diamond More Jewelry

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199
1,773
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Gemstone: Diamond
18 Karat Yellow Gold Diamond Lapis Lazuli and White Agate Elephant Cufflinks
Located in Milano, IT
The front face of this striking pair of cufflinks is made of lapis lazuli and shaped as an elephant head, with white agate to recreate the tusks and diamonds for the eyes. An 18 kara...
Category

2010s Diamond More Jewelry

Materials

Agate, Diamond, White Diamond, Lapis Lazuli, 18k Gold, Yellow Gold

Tiffany & Co. Certified Multi Color Diamond Flower Brooch
Located in New York, NY
Tiffany & Co Certified Multi color Diamond Flower Brooch, Circa 1940, set with fancy colored diamonds in shades of pink, green, blue, grey, yellow, brown & orange. Marquise brillian...
Category

1970s Vintage Diamond More Jewelry

Materials

Diamond, Palladium

Edwardian Pavè Diamond Platinum-Topped 18 Karat Yellow Gold Bird Swallow Charm
Located in Philadelphia, PA
Charm is designed as a swallow mid-flight with spread wings and a split tail. Symbolic of love since they mate for life and are thought to guide sailors home. Pavè set in platinum wi...
Category

1910s Edwardian Vintage Diamond More Jewelry

Materials

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

0.98 Carat Pear Shaped Emerald & Diamond Pendant in 18k Two Tone Gold
Located in Chicago, IL
Perfect for those who appreciate vintage-style elegance. This enchanting brightly polished 18k white gold pendant features a 0.98 carat oval cut fine quality emerald exhibiting a lus...
Category

2010s Contemporary Diamond More Jewelry

Materials

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

Aigrette Headpiece in 18 Karat Gold, Diamonds and Pearls
Located in Brisbane, QLD
An incredible Edwardian aigrette headpiece crafted from 18 karat yellow gold, diamonds and natural cultured pearls. The pin is attached to a split yellow gold plated hinged pin which...
Category

Early 20th Century Edwardian Diamond More Jewelry

Materials

Diamond, Pearl, Gold, 18k Gold, Gold Plate, Yellow Gold

French, 19th Century, 18 Karat Yellow Gold and Diamond ‘En Tremblant’ Brooch
Located in Brisbane, QLD
An exceptional French, floral spray 'en tremblant' brooch pin. This 18 karat gold piece comprises of several components which screw together to form one large brooch. The piece can b...
Category

Late 19th Century Victorian Antique Diamond More Jewelry

Materials

Diamond, Gold, 18k Gold, Yellow Gold

Diamond Ring 18K White Gold Lotus Collection
Located in Henrico, VA
Part of our LOTUS Collection, we have create a moment in time where everything stands still and makes a statement. OR, shakes things up a bit! Whether you wear it up or wear it down...
Category

21st Century and Contemporary Diamond More Jewelry

Materials

Diamond, White Diamond, 18k Gold, White Gold

Victorian 15kt. Yellow Gold and Sterling Silver Arrow Pin Brooch
Located in Braintree, GB
Antique Victorian 15kt. yellow gold and sterling silver arrow pin brooch set with 0.27 ct. rose-cut diamonds. Made in England Circa 1880's Tested positive for 15kt gold and sterlin...
Category

1880s Victorian Antique Diamond More Jewelry

Materials

Diamond, Yellow Gold, Sterling Silver

Crivelli Charm Link Lock Pendant or Closure 18 Karat Gold Diamonds Open Close
Located in Bilbao, ES
Charm Link Lock Pendant or Closure 18 Karat White Gold and Diamonds Open Close was founded in Valenza Italy in the 70’s, when Bruno Crivelli decided to transcend his vast experience ...
Category

21st Century and Contemporary Contemporary Diamond More Jewelry

Materials

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

Art Deco Platinum Pin Old Mine Diamonds 4.50 Carat
Located in MIAMI, FL
Gorgeous creation from the Art Deco time period. The pin is crafted in platinum with filagree details decorating the piece. The pin shows sharp angles as the pin is set with over 4.5...
Category

Early 20th Century Art Deco Diamond More Jewelry

Materials

Diamond, Platinum

Victorian Coral and Diamond Stick Pin
Located in London, GB
A Victorian coral and diamond stick pin, the drop-shaped coral measuring approximately 9.85x7.8mm surrounded by a coiled gold snake encrusted with twenty-two rose-cut diamonds estima...
Category

1880s Victorian Antique Diamond More Jewelry

Materials

Coral, Diamond, Yellow Gold

1850's Georgian Rose Cut Diamond Silver-Topped 14 Karat Gold Cross Charm Pendant
Located in Philadelphia, PA
Designed as a cross set throughout by rose cut diamonds Weighing in total approximately 0.20 carat Diamonds are foil-backed with quality consistent with cut and age Tested as silv...
Category

1850s Georgian Antique Diamond More Jewelry

Materials

Diamond, White Diamond, Gold, 14k Gold, Yellow Gold, Silver

Diamond Ring 18K White Gold Cuff Dot Collection
Located in Henrico, VA
The first of the "DOT" collection starts off with a simple nod to the beginning of anything or the end to a statement. It's represents the sun, the seed and unity...a symbol of the s...
Category

21st Century and Contemporary Diamond More Jewelry

Materials

Diamond, White Diamond, 18k Gold, White Gold

Antique Diamond Large and Impressive Pendant Brooch, circa 1900
Located in Aspen, CO
Antique Edwardian diamond pendant/brooch possessing fine white old cut diamonds. This brooch or pendant is one of the better examples of a starburst brooch from this time period. Th...
Category

Early 20th Century Edwardian Diamond More Jewelry

Materials

Diamond, 18k Gold, Platinum

Harakh GIA Certified 0.50 CT E-Color VS1 Clarity Pear Brilliant Loose Diamond
Located in New York, NY
GIA certified, 0.50 carat colorless diamond – certified as E color, VS1 clarity by GIA, this diamond exhibits ideal brilliance, excellent polish and very good symmetry. Measuring 6.7...
Category

2010s Modern Diamond More Jewelry

Materials

Diamond

Harakh GIA Certified 0.40 Carat E Color VS2-Clarity Brilliant Cut Loose Diamond
Located in New York, NY
Excellent cut colorless diamond – certified as E color, VS2 clarity by GIA, this diamond exhibits ideal brilliance, excellent polish and excellent symmetry. Measuring 4.73- 4.75 x 2....
Category

2010s Modern Diamond More Jewelry

Materials

Diamond

Betony Vernon "O'Ring Navel Piercing" Piercing 18 Karat Gold in Stock
Located in Paris, Paris
The "O'Ring Navel Piercing" was designed by Betony Vernon in 1997 and handcrafted in lost wax elements. It is a stunning body safe alternative to traditional piercing. It may also be...
Category

1990s Contemporary Diamond More Jewelry

Materials

Diamond, 18k Gold, Gold

Yellow Gold Green Amethyst, Citrine & Diamond Enhancer Pendant 14k Pear 17.41ctw
Located in Greensboro, NC
Metal Content: 14k Yellow Gold & 14k White Gold Stone Information Genuine Green Amethyst (Prasiolite) Carat: 12.90ct Cut: Pear Genuine Citrine Treatment: Heating Carat: 4.50ct Cut:...
Category

Late 20th Century Diamond More Jewelry

Materials

Amethyst, Citrine, Diamond, Yellow Gold

Cartier 8P Diamonds 18 Karat White Gold Clover Charm
Located in Tokyo, JP
Brand:Cartier Name:Diamond clover charm Material:8P diamond, 750 K18 WG white gold Weight:4.0g(Approx) Size:H26mm(Including Vatican)×W12.37mm / H1.02in(Including Vatican)×W 0.48in(Ap...
Category

Early 2000s Diamond More Jewelry

Materials

Diamond, 18k Gold, White Gold

Kabana 14K Yellow Gold 0.05 Ct Diamond and Spiny Star of David Pendant
Located in Southampton, PA
This Kabana 14K Yellow Gold 0.05 ct Diamond Spiny Star of David Pendant is made with 14K yellow gold. The face of the pendant is inlaid with a deep red spiny, forming a Star of David...
Category

21st Century and Contemporary Diamond More Jewelry

Materials

Diamond, Yellow Gold

Loose Diamond, 0.94ct, GIA Certified, Cushion Modified Brilliant Cut
Located in Vienna, VA
Loose Diamond, 0.94ct, GIA Certified, Cushion Modified Brilliant Cut Loose Cushion Modified Brilliant Cut Diamond GIA Certified Weight: 0.94ct Clarity: VS1 Color: G Measurements: 6....
Category

15th Century and Earlier Antique Diamond More Jewelry

Materials

Diamond

Diamond Necklace
Located in Geneva, CH
Necklace in 18kt white gold set with 93 diamonds 14.57 cts  G VS1
Category

21st Century and Contemporary Contemporary Diamond More Jewelry

Materials

Diamond, 18k Gold

18 Karat Yellow Gold Elephant Mother of Pearl and White Agate Cufflinks
Located in Milano, IT
The front face of these striking cufflinks is made in the shape of an elephant head, masterfully made of mother of pearl with diamonds to mark the eyes. The toggle depicts an elephan...
Category

2010s Diamond More Jewelry

Materials

Agate, Diamond, White Diamond, 18k Gold, Yellow Gold

Kabana 14K Yellow Gold 0.33 Ct Diamond, Spiny, and Mother of Pearl Hamsa Pendant
Located in Southampton, PA
This chic pendant from Kabana is a unique interpretation of the iconic Hamsa symbol. Spiny and Mother of Pearl in opulent, autumnal colors add elegance to this piece, which measures ...
Category

21st Century and Contemporary Diamond More Jewelry

Materials

Diamond, Pearl, Yellow Gold

David Yurman Black Orchid Albion Jewelry Suite w Ring, Earrings, Pendant
Located in Mount Kisco, NY
By well known designer David Yurman, enjoy this suite from the Albion Collection in Black Orchid. Albion's signature is a faceted, cushion shape designed to be worn day or evening, a...
Category

2010s Diamond More Jewelry

Materials

Amethyst, Diamond, Sterling Silver

Yellow Gold Emerald & Diamond Leopard Brooch, 14k Round .18ctw Jungle Cat Pin
Located in Greensboro, NC
Metal Content: 14k Yellow Gold & 14k White Gold Stone Information: Genuine Emeralds Treatment: Oiling Carats: .12ctw Cut: Round Color: Green Natural Diamonds Carats: .06ctw Cu...
Category

Late 20th Century Diamond More Jewelry

Materials

Diamond, Emerald, Yellow Gold

Edwardian 3.40 Carats Diamond Purple Sapphire Platinum Cameo Stickpin
Located in Philadelphia, PA
Featuring an oval sapphire weighing approximately 3.00 carats Medium light purple in color Finely carved to depict the cameo of a proud Grecian woman with wavy hair and hairpiece ...
Category

1910s Edwardian Vintage Diamond More Jewelry

Materials

Diamond, White Diamond, Sapphire, Purple Sapphire, Platinum

1980s French Diamond and Yellow Gold 18 Karat Dachshund Dog Brooch Clip
Located in Geneva, CH
1980S French Diamond and Yellow Gold 18k Dachshund Dog Brooch Clip. Total length: 1.18 inch (3.00 centimeters). Total height: 0.79 inch (2.00 centimeters). Not cutest as your real ...
Category

1980s Aesthetic Movement Vintage Diamond More Jewelry

Materials

Diamond, 18k Gold, Yellow Gold

B Dead or Alive Gold & Diamond Pendant
Located in New York, NY
Hilarious charm: Large diamond shaped charm/pendant. 14K shiny yellow gold. On the front, there is a diamond-encrusted "B." The reverse side is hand-engraved "Dead or Alive." 1...
Category

1950s Vintage Diamond More Jewelry

Materials

Diamond, Gold, 14k Gold

Yellow Gold Sapphire & Diamond Ring, 14k Marquise Cut 1.02ctw
Located in Greensboro, NC
This ring is a size 6 1/2, but it can be re-sized up 2 sizes for a $25 fee or down 2 sizes for a $20 fee. Once a ring is re-sized, we guarantee the work but we are unable to offer a ...
Category

Late 20th Century Diamond More Jewelry

Materials

Diamond, Sapphire, Yellow Gold

Yellow Gold Diamond Ribbon Heart Pendant, 10k Single Cut .25ctw Love
Located in Greensboro, NC
Metal Content: 10k Yellow Gold & 10k White Gold Stone Information Natural Diamonds Total Carats: .25ctw Cut: Single Color: M - N Clarity: SI2 - I1 Theme: Ribbon Heart, Love Measu...
Category

Late 20th Century Diamond More Jewelry

Materials

Diamond, Yellow Gold

Montega Watch
Located in Geneva, CH
Montega watch in steel, Sura dial, bezel set with 48 diamonds 0.89 cts with prong buckle alligator strap quartz movement
Category

21st Century and Contemporary Contemporary Diamond More Jewelry

Materials

Diamond, Steel

Squirrel Diamond on Gold Brooch
Located in Geneva, CH
Lovely Squirrel Brooch set by 30 Diamonds 3.41 carats, 261 Diamonds 3.90 carats, one Emeraude 0.12 carat and one Ruby 2.02 carats on white gold 18k.
Category

21st Century and Contemporary Aesthetic Movement Diamond More Jewelry

Materials

Diamond, Gold

Vintage Sapphire Diamond 18k Yellow Gold Earring and Necklace Set, Circa 1970
Located in Jesmond, Newcastle Upon Tyne
A stunning, fine and impressive vintage 35.64 carat sapphire and 8.15 carat diamond, 18 karat yellow gold earring and necklace set; part of our diverse vintage jewelry and estate jew...
Category

1970s Vintage Diamond More Jewelry

Materials

Diamond, Sapphire, Yellow Gold

Diamond and Akoya Sea-Water Cultured Pearl Spiral Shell Pendant in 18 Carat Gold
Located in London, GB
An 18 carat Yellow Gold Pendant designed as a spiralling shell decorated with round brilliant-cut diamonds and Akoya cultured pearls graduating to a larger pearl centre. Also decorat...
Category

2010s Modern Diamond More Jewelry

Materials

White Diamond, Cultured Pearl, 18k Gold

Rare 18ct Gold Enamel Diamond-Set Pocket Watch Signed Waltham Mass, 1877
Located in London, GB
A Rare 18CT Gold Enamel Diamond-Set Antique Pocket Watch Signed Waltham Mass Circa. 1877 A truly exquisite beautiful antique pocket watch and a rare find! This Waltham pocket watch ...
Category

19th Century Antique Diamond More Jewelry

Materials

Diamond, Enamel, Gold

Absolutely Beautiful Antique Gold Heart Locket
Located in New York, NY
Everything a locket should be: antique, heart-shaped, allover beautifully embossed leaf pattern on front and back, set with a center diamond. 14K yellow gold. Significant size -- 1...
Category

1910s Vintage Diamond More Jewelry

Materials

Diamond, 14k Gold

Black Starr and Frost Antique Diamond Pearl Enamel Gold Pendant Brooch 1890 USA
Located in Munich, Bavaria
Beautiful polychrome enamel painting of a lady with blonde hair and a red hat with a feather. She is wearing a renaissance costume with a lace collar. The square enamelled plaque is ...
Category

1890s Renaissance Revival Antique Diamond More Jewelry

Materials

Diamond, Gold

GIA Certified Natural 1.12ct Fancy Vivid Greenish Yellow Diamond
Located in JOHANNESBURG, ZA
GIA Certified Natural 1.12ct Fancy Vivid Greenish Yellow Diamond
Category

2010s Diamond More Jewelry

Materials

Diamond

2.31 Carat Pave Diamond Tagliatelle Platinum and 18 Karat White Gold Ribbon Pin
Located in Dallas, TX
A glamorous ribbon pin crafted in platinum and 18 karat white gold is pave set with a total of 2.31 carats of round brilliant cut diamonds (G-H color and VS clarity). This stunning ...
Category

Early 2000s Modern Diamond More Jewelry

Materials

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

2.67 Carat Diamond Pave Hamsa Pendant 14 Karat in Stock
Located in Boca Raton, FL
Disclaimer: This listing is for the pendant ONLY Material: 14k Yellow Gold Diamond Details: Approx. 2.67ctw of round cut Diamonds. Diamonds are G/H in color and SI/VS in clarity, 281...
Category

21st Century and Contemporary Diamond More Jewelry

Materials

Diamond, White Diamond, 14k Gold, Yellow Gold

Loose Diamond, 0.96 CT, GIA Certified, Emerald Cut
Located in Vienna, VA
Loose Diamond, 0.96 CT, GIA Certified, Emerald Cut Loose Emerald Cut Diamond GIA Certified Weight: 0.96 CT Clarity: VS1 Color: H Measurements: 5.98 X 4.95 X 3.62 MM GIA & IGI Inscri...
Category

21st Century and Contemporary Diamond More Jewelry

Materials

Diamond, Emerald

Victor Mayer Hallmark Heart-Shaped 18k Yellow Gold Locket with 14 Diamonds Ruby
Located in Pforzheim, DE
Victor Mayer Hallmark Heart-Shaped 18k Yellow Gold Locket with 14 Diamonds ruby Locket, 18k yellow gold, 14 diamonds total 0.14 ct, H VS, ruby 0.28 ct Reference: 47370/00/3G/00/102 ...
Category

2010s Contemporary Diamond More Jewelry

Materials

Diamond, Ruby, 18k Gold, Yellow Gold

9.70 Carat Natural Diamond and Ruby 14 Karat Solid White Gold Men's Ring
Located in Los Angeles, CA
9.70 Carats Natural Diamond & Ruby 14K Solid White Gold Men's Ring Amazing looking piece! Total Natural Round Cut Diamonds Weight: Approx. 0.70 Carats (color G-H / Clarity SI...
Category

2010s Diamond More Jewelry

Materials

Diamond, Ruby, 14k Gold, White Gold

1960s French Diamond Ruby Yellow Gold 18 Karat Elephant Brooch Clip
Located in Geneva, CH
1960S French Diamond Ruby Yellow Gold 18k Elephant Brooch Clip. The Elephant is considered a symbol of good luck, power, success wisdom and experience. Size: 1.18 x 1.18 inch (3.00 ...
Category

1960s Aesthetic Movement Vintage Diamond More Jewelry

Materials

Diamond, Ruby, 18k Gold, Yellow 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 More Jewelry

Materials

Diamond, Platinum

Antique Platinum Diamond Ring, circa 1910
Located in Toronto, ON
Antique Platinum Diamond Ring, C.1910. The Ring centre claw set with an old mine cut diamond gauging approximately 6.29 x 6.20 x 4.41 mm, approximately 1.05 cts, approximately SI1 cl...
Category

1910s Vintage Diamond More Jewelry

Materials

Diamond, Platinum

Vintage Sapphire and Rose Cut Diamond French Poodle Brooch Set in 9k Yellow Gold
Located in London, GB
A delightful yellow gold poodle brooch This useful brooch is exquisitely hand crafted in 9K yellow gold and features textured gold fur, a sparkling collar studded with rose cut diam...
Category

1980s Retro Vintage Diamond More Jewelry

Materials

Diamond, Blue Sapphire, Sapphire, 9k Gold, Yellow Gold, Gold

Sapphire, Diamond and Green Tsavorite 18 Karat Large Flower Brooch
Located in Aspen, CO
Sapphires displaying a bight lively blue are pave set in the petals of this flower. Green tsavorite garnets are set throughout the stem and leaves, and finally we have very white di...
Category

21st Century and Contemporary Modern Diamond More Jewelry

Materials

Diamond, Sapphire, Tsavorite, 18k Gold

Le Vian 6.98 Carat Blue Topaz White Gold Pin
Located in Great Neck, NY
This glistening brooch by Le Vian features a round shaped Blue Topaz center surrounded by pear shaped Blue Topaz (nearly 7-carats t.w.) with accents of Chocolate Diamonds and Vanilla...
Category

2010s Diamond More Jewelry

Materials

Topaz, White Diamond, 14k Gold, White Gold

Antique Diamond 14 Karat Gold Flower Locket Pendant
Located in Munich, Bavaria
The locket is made out of 14 karat gold and decorated with a flower set with old cut diamonds. The pendant dates back to 1875 ca.
Category

1870s Victorian Antique Diamond More Jewelry

Materials

Diamond, 14k Gold

3.89 Carat Yellow Sapphire and Diamond Van Cleef & Arpels Clip 18 Karat Yellow
Located in Charleston, SC
Van Cleef & Arpels Clip in 18 Karat Yellow Gold and Platinum. Signed Piece. Holds 3.69 Carats of Yellow Sapphires and 0.20 Carats of Diamonds in the Platinum band that pinches the ...
Category

Mid-20th Century Modern Diamond More Jewelry

Materials

Diamond, Yellow Sapphire, 18k Gold, Platinum

Antique Rose Cut Diamond Star Necklace
Located in Geneva, CH
Antique Rose cut Diamond on Silver and Gold Chain Necklace. Pendant representing a Star. Pendant length: 4.50 centimeters. Star's diameter: approximately 16.24 millimeters. Central r...
Category

Early 20th Century Diamond More Jewelry

Materials

Diamond

Heavy 5.80 Carat Natural Diamond 14 Karat Solid Yellow Gold Men's Ring
Located in Los Angeles, CA
Heavy 5.80Ct Natural Diamond 14K Solid Yellow Gold Men's Ring Amazing looking piece! Total Natural Round Cut Diamonds Weight: Approx. 5.80 Carats (color H-I / Clarity SI1-SI2...
Category

2010s Diamond More Jewelry

Materials

Diamond, 14k Gold, Yellow Gold

Heavy 5.00 Carat Natural Diamond 14 Karat Solid Yellow Gold Men's Ring
Located in Los Angeles, CA
Heavy 5.00Ct Natural Diamond 14K Solid Yellow Gold Men's Ring Amazing looking piece! Total Natural Round Cut Diamonds Weight: Approx. 5.00 Carats (color G-H / Clarity SI1-SI2...
Category

2010s Diamond More Jewelry

Materials

Diamond, 14k Gold, Yellow Gold

Emerald and 0.70 Carat Diamond 18 Carat White and Yellow Gold Vintage Brooch
Located in Hamilton, AU
This enchanting vintage brooch is forged in 18 carat yellow and white gold and features a twisted bar design that is carefully set with natural emeralds bordered by round brilliant c...
Category

Early 20th Century Modern Diamond More Jewelry

Materials

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

SeidenGang 18 Karat Yellow Gold Cufflinks with 0.36 Carat of Diamonds
Located in Philadelphia, PA
SeidenGang 18k yellow gold cufflinks with a textured finish and 0.36 carat of round diamonds estimated to be F-G color with VS clarity. These cufflinks measure 0.88" by 0.75". 18.91...
Category

Late 20th Century Diamond More Jewelry

Materials

Diamond, 18k Gold, Yellow Gold

Cartier Diamond 18 Karat Yellow Gold C De Cartier Initial Logo Charm
Located in Philadelphia, PA
Charm is designed as Cartier's iconic double C logo Bead set with round brilliant cut diamonds Weighing in total approximately 0.25 carat with F/G color and VS clarity Completed b...
Category

Late 20th Century Contemporary Diamond More Jewelry

Materials

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