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GIA Certified 0.44 Carat Fancy Greenish Blue SI2 Clarity Diamond
Located in บางรัก, TH
laboratories in the world. GIA certification ensures that the diamond's key characteristics including cut
Category

2010s Asian Loose Gemstones

Materials

Diamond

GIA Certified 0.45 Carat Fancy Light Greenish Blue VVS2 Clarity Diamond
Located in บางรัก, TH
certification ensures an objective, accurate, and detailed evaluation of a diamond's key characteristics cut
Category

2010s Asian Loose Gemstones

Materials

Diamond

GIA Certified 4.03 Carat Faint Pink VS1 Clarity Diamond
Located in บางรัก, TH
authority in diamond grading. GIA certification ensures that the diamond's key characteristic its carat
Category

2010s Asian Loose Gemstones

Materials

Diamond

Victorian 18 Karat Yellow Gold Fob and Watch Winder Key
Located in Washington Depot, CT
with one round brilliant diamond and one rose cut diamond set in green enamel. Key is accented with two
Category

Antique 19th Century More Jewelry

Materials

Multi-gemstone, Yellow Gold

18k/PLATINUM Old European Cut Natural Diamond Cluster Earrings. 1.26TCW
Located in Victoria, BC
features and historical context about Old European cut diamonds: Key Features Shape: They are round in
Category

Vintage 1930s American Art Deco Stud Earrings

Materials

Diamond, 18k Gold, Platinum

HARRY WINSTON Asscher-Cut Golconda Diamond Ring
By Harry Winston
Located in New Orleans, LA
IIa, meaning there is no trace of nitrogen (the element that gives diamonds color), a key
Category

American Engagement Rings

Materials

Diamond, Platinum

Art Deco Diamond and Sapphire Bracelet
Located in Houston, TX
are elongated Greek Keys set with diamonds and sapphire bars in between each link. There are a total
Category

Vintage 1920s Unknown Art Deco Link Bracelets

Materials

Diamond, Sapphire, 18k Gold, Platinum

3.02 Carat Pear-Cut Golconda Diamond Platinum Ring
Located in New Orleans, LA
diamonds color), key hallmarks of all Golcondas. The Type IIa classification also means that this diamond
Category

21st Century and Contemporary Indian Contemporary Engagement Rings

Materials

Diamond, Platinum

Syna Yellow Gold Love Locked Pendant with Champagne Diamonds
By Syna Jewels
Located in Fort Lee, NJ
Created in 18 karat yellow gold Love locked pendant with heart key Champagne diamonds 0.60 ct
Category

2010s Unknown Contemporary Pendant Necklaces

Materials

Diamond, Brown Diamond, 18k Gold, Yellow Gold

Queen Mary s Natural Pearl and Diamond Pin
Located in New Orleans, LA
the Cambridge Lover’s Knot Tiara and this incredible pearl and diamond brooch. She remained a key
Category

20th Century French Belle Époque Brooches

Materials

Diamond, Natural Pearl, Platinum

Judith Ripka White Quartz Diamond Yellow Gold Enhancer
By Judith Ripka
Located in Southampton, PA
presence at key points along the perimeter. The diamonds at the top shine inside a heart motif.
Category

20th Century American Necklace Enhancers

Materials

Quartz, White Diamond, 18k Gold, Yellow Gold

Enamel Green Eternity Diamond Yellow Gold 18 Karat
By Shimon s Creations
Located in New York, NY
This green enamel with "A" as an Initial key with diamond accents ring. It is in a new condition
Category

2010s American Contemporary More Rings

Materials

Diamond, 18k Gold, Yellow Gold, Enamel

GIA Certified 1.01 Carat Faint Blue VS2 Clarity Diamond
Located in บางรัก, TH
includes several key factors that determine the quality and value of the diamond.
Category

2010s Asian Loose Gemstones

Materials

Diamond

GIA Certified 3.00 S - T Colour VS1 Clarity Diamond
Located in บางรัก, TH
-depth, unbiased assessment of the diamond's quality, including the key attributes known as the 4 Cs
Category

2010s Asian Loose Gemstones

Materials

Diamond

Carved Jade Diamond Gold Pendant On Jade Bead Necklace
Located in Boca Raton, FL
greek key carving and diamonds. The pendant comes on a 16 inch jade beaded necklace with lobster claw
Category

Mid-20th Century Unknown Classical Greek Beaded Necklaces

Materials

Jade, White Diamond, 18k Gold

J. Birnbach Art Deco Emerald and Diamond Bracelet
Located in New York, NY
as it is rare. Key Details - Diamonds: approx. 11.00 carats - Emeralds: approx. 4.50 carats
Category

Early 20th Century Unknown Art Deco Link Bracelets

Materials

Diamond, Emerald, Platinum

16.40 Carat Diamonds Pearls Sautoir Lariat Tassel Necklace, 18K White Gold.
Located in New York, NY
delicate design and shimmering diamonds will infuse a touch of glamour into every outfit. Key Features
Category

2010s American Art Deco Multi-Strand Necklaces

Materials

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

J. Birnbach Marquise Sapphire and Diamond Floral Motif Necklace
By J. Birnbach
Located in New York, NY
diamonds with the rich allure of sapphires. Designed with exquisite craftsmanship, the necklace features a
Category

21st Century and Contemporary American Contemporary Link Necklaces

Materials

Diamond, Sapphire, Platinum

Gorgeous 18k White Gold Necklace 1.56 Carat Round Brilliant Diamond
Located in רמת גן, IL
is sure to make a lasting impression. Key Features: 78 diamonds totaling 1.56 carat round brilliant
Category

2010s Israeli Necklace Enhancers

Materials

Diamond, Gold, 18k Gold, White Gold

French Horn Black White Natural Diamond Pin Pendant 18k White Gold
Located in Orlando, FL
instrument and sparkling pavé diamonds enhancing its curves and keys. Condition: In excellent condition with
Category

21st Century and Contemporary Brooches

Materials

Diamond, 18k Gold, White Gold

Antique Victorian 10.54 Carat Diamond and Yellow Gold Silver Set Bracelet
Located in Jesmond, Newcastle Upon Tyne
diamond Greek key bracelet has been crafted in 9k yellow gold with a silver setting. The articulated
Category

Antique 1890s British Victorian Link Bracelets

Materials

Diamond, 9k Gold, Yellow Gold

Vintage Diamond Heart 14k Gold Necklace Pendant Pin Brooch Estate Jewelry
Located in Beverly Hills, CA
is timeless and chic. Below are key features of diamonds by the yard necklace. • Diamond Size The
Category

Vintage 1980s Unknown Pendant Necklaces

Materials

Diamond, 14k Gold, White Gold

Egyptian Revival Hieroglyphic Bird Diamond Ruby Sapphire Emerald Onyx Brooch
Located in Lisbon, PT
and openwork Greek key accents. Diamonds: Old European brilliant-cut, Transitional round brilliant
Category

Vintage 1920s Unknown Art Deco Brooches

Materials

Diamond, Emerald, Onyx, Ruby, Sapphire, Platinum

GIA 2.13 Carat Antique Cushion Cut Diamond Stud 14 Karat White Gold Earrings
Located in Beverly Hills, CA
and make these radiant diamonds a key piece of your everyday look. Flawless Protection Plan: -7-day
Category

2010s Unknown Stud Earrings

Materials

Diamond, 14k Gold, White Gold

Art Deco GIA 1.00 Carat M Color VS2 Diamond Ring 14K White Gold Ring Size 5.75
Located in Media, PA
. Key Features: Center Diamond: 1.00 carats, M color, VS2 clarity (GIA Certified) Accent Stones: 11
Category

Vintage 1930s Engagement Rings

Materials

Diamond, 14k Gold, White Gold

10 k Diamond Sapphire Heart Animal Pendant set
Located in Vaughan, CA
small diamond encrusted key. Can be worn together or seperately. Total weight is 9.0 grams.
Category

21st Century and Contemporary Pendant Necklaces

Materials

White Gold

Patek Philippe 18K Gold "Les Greques" REF4632 Rectangular Ladies Wristwatch
By Patek Philippe
Located in New York, NY
", ref. 4633 Dial: silvered with Greek key patterned perimeter, diamond hour indexes at twelve, three
Category

20th Century Swiss Modern Wrist Watches

Materials

Diamond, Gold, 18k Gold, Yellow Gold

Clarissa Bronfman 14k Gold Eye Shape Charm Holder Multi Charms on Gold Chain
By Clarissa Bronfman
Located in New York, NY
, enamel, diamond evil eye - solid 14k gold, diamond crown key pendant
Category

21st Century and Contemporary Unknown Contemporary Chain Necklaces

Materials

Diamond, Lapis Lazuli, Gold, 14k Gold, Gold Plate, Sterling Silver, Enamel

Vintage Patek Philippe 18 Karat Yellow Gold Les Grecques Model 4732J
By Patek Philippe
Located in New York, NY
Maker: Patek Philippe Model: Les Grecques 4732J Year: 1980s Material: 18k Yellow Gold Dial: Diamond
Category

Late 20th Century Swiss Modern Wrist Watches

Materials

Diamond, 18k Gold, Yellow Gold

Tiffany Co Platinum and Diamond key Pendant Necklace
By Tiffany Co.
Located in Tampa, FL
Tiffany & Co Platinum and Diamond key Pendant Necklace
Category

21st Century and Contemporary American Modern Pendant Necklaces

Materials

Diamond, Platinum

Blue Sapphire Diamond Key Pendant
Located in Boca Raton, FL
. Diamond Details: Approximately 0.10ctw round brilliant diamonds. Diamonds are G/H in color and VS in
Category

21st Century and Contemporary American Art Deco Pendant Necklaces

Materials

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

Vintage Theo Fennell Diamond Key Necklace Set in 18k White Gold
By Theo Fennell
Located in London, England
A beautiful vintage Theo Fennell diamond key pendant necklace set in 18k white gold. The pendant
Category

Early 2000s Modern Pendant Necklaces

Materials

Diamond, Gold, 18k Gold, White Gold

18 Karat White Gold Jadeite and Diamond Key Pendant with Necklace
Located in Macau, MO
A jadeite and diamond key pendant, composed of a cylindrical jadeite rod of vivid emerald green
Category

2010s Hong Kong Contemporary Pendant Necklaces

Materials

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

Tiffany Co. Custom Made Fancy Yellow Diamond Key Pendant in 18Kt Gold 4.14 CTW
By Tiffany Co.
Located in New York, NY
Tiffany & Co. Custom Made Fancy Yellow Diamond Key Pendant in 18KT Gold 4.14 CTW PRIMARY DETAILS
Category

21st Century and Contemporary Pendant Necklaces

Materials

White Gold

14k gold 0.09cts Diamond key shape Pendant
Located in jaipur, IN
Diamond wt 0.09cts gold net wt 0.672gm(14k)
Category

2010s Pendant Necklaces

Art Deco Platinum Emerald Diamond Key Charm Pendant
Located in London, GB
An Art Deco platinum charm pendant designed as a key set with 29 round brilliant cut diamonds with
Category

20th Century Unknown Art Deco Charm Bracelets

Materials

Diamond, White Diamond, Emerald, Platinum

Chopard Rose Gold Diamond Key Pendant and Necklace
By Chopard
Located in Boca Raton, FL
Designer: Chopard Material: 18k Rose Gold Diamond Details: Approximately 1ctw of round brilliant
Category

21st Century and Contemporary Swiss Chain Necklaces

Materials

Diamond, White Diamond, 18k Gold, Rose Gold

Diamond Key Gold Pendant Necklace Estate Fine Jewelry
Located in Montreal, QC
Simply Beautiful! Finely Detailed Diamond Gold Key Pendant Necklace. Hand set with 0.30tcw Diamonds
Category

21st Century and Contemporary Modern Pendant Necklaces

Materials

Diamond, Gold, 18k Gold, Yellow Gold

Diamond Key Pendant in 18 Karat Rose Gold
Located in Hong Kong, HK
This pendant features 0.40 carat of diamonds, set in 18 karat rose gold. Great for everyday use
Category

2010s Hong Kong Contemporary Pendant Necklaces

Materials

Diamond, 18k Gold, Rose Gold

Tiffany Co. Rose Gold and Diamond Key Pendant Necklace
By Tiffany Co.
Located in Chicago, IL
Circa 2017 Tiffany & Company 18K Rose Gold Key pendant necklace, measuring 1 1/8 inches in length
Category

2010s American Pendant Necklaces

Materials

Diamond, 18k Gold

18k Solid Gold 0.20ctw Round Brilliant Pave Diamond Key Charm Pendant
Located in Montclair, NJ
--Stone(s):-- Numerous Natural Genuine Diamonds - Round Brilliant Cut - Pave Set - Nice Brilliant
Category

21st Century and Contemporary Pendant Necklaces

Materials

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

Tiffany Co. Fleur De Lis Platinum 18K Gold Diamond Key Pendant Necklace
By Tiffany Co.
Located in Houston, TX
inches Weight: 6.06 grams Lady's TIFFANY & CO. 18K yellow gold and 950 platinum diamond necklace
Category

21st Century and Contemporary Unknown Pendant Necklaces

Materials

Diamond, Gold, 18k Gold, Yellow Gold, Platinum

Tiffany Co. Enchant Primrose Diamond Key Pendant in Platinum 0.98 Carat
By Tiffany Co.
Located in New York, NY
Retails for 9100 USD. In excellent condition and recently polished. Comes with the original box. Length 2.25 inch.
Category

21st Century and Contemporary Pendant Necklaces

Materials

Platinum

Tiffany Co .7 Carat Diamond Yellow Gold Key Pendant
By Tiffany Co.
Located in Stamford, CT
Atlas diamond key from Tiffany & Co in solid 18k yellow gold. 18 full cut diamonds .7cts 18 full
Category

21st Century and Contemporary Necklace Enhancers

Materials

Diamond, Gold, 18k Gold, Yellow Gold

18 Karat White Gold and Diamond Petals Key Pendant Necklace, Tiffany Co. Style
Located in Manhasset, NY
18Kt White Gold & Diamond Key Pendant Necklace, in the manner of Tiffany and Company on a 14KT
Category

Late 20th Century Art Deco Pendant Necklaces

Materials

Diamond, 18k Gold, White Gold

Tiffany Co. Diamond Clover Leaf Key Pendant in 18kt Yellow Gold , Box incl.
Located in Miami, FL
Offered here is a Tiffany & Co. Clover Leaf Key Pendant in 18kt yellow gold with diamonds
Category

2010s American Contemporary Pendant Necklaces

Materials

Diamond, 18k Gold, Yellow Gold

Tiffany Co. Diamond Platinum Tiffany Keys Ornate Heart Key Pendant
By Tiffany Co.
Located in Hicksville, NY
Tiffany Keys Collection Ornate Heart Key Pendant Necklace - Platinum, Diamonds Features 1.12 carat
Category

21st Century and Contemporary American Modern Pendant Necklaces

Materials

Diamond, Platinum

Diamond Clover Cutout Key Pendant
Located in Boca Raton, FL
Material: 18k rose gold Diamond Details: Approximately 0.10ctw round brilliant diamonds. Diamonds
Category

21st Century and Contemporary American Art Deco More Jewelry

Materials

White Diamond, 18k Gold, Rose Gold

Classic 18K Yellow Gold Colombian Emerald and Diamond Ring
By Royaal Stones Ltd
Located in Bangkok, Thailand
contrast to the cool green of the emerald and the icy sparkle of the diamonds . Key Features: Metal: 18K
Category

21st Century and Contemporary Colombian Artisan Cocktail Rings

Materials

Diamond, Emerald, 18k Gold, Yellow Gold

Tiffany Co. Diamond Gold Crown Key Pendant
By Tiffany Co.
Located in San Francisco, CA
Tiffany & Co. Crown Key collection in 18k white gold and 0.25 carats of round brilliant diamonds
Category

21st Century and Contemporary American Pendant Necklaces

Materials

Diamond, 18k Gold

Ruby Diamond Gold Heart Key Pendant Necklace
By La Fleur Jewels
Located in Bangkok, TH
A dream of heart key for Valentine's day is a very nice looking.The invisible ruby heart shape of
Category

20th Century Pendant Necklaces

Materials

Diamond, Ruby, 18k Gold

Tiffany Co 1.14ct Diamond Victoria Key Pendant
By Tiffany Co.
Located in London, GB
Radiating with sparkle is this diamond pendant from Tiffany’s well known key collection. This
Category

21st Century and Contemporary Unknown Pendant Necklaces

Materials

Diamond, 18k Gold, White Gold

1830s French Diamond Set Key Wind Ring Watch
Located in Chicago, IL
Circa 1830s French Gold and Gem set Ring Watch by Fourner Les Aiguilles. Key Wind Cylinder movement
Category

Antique 1830s French Wrist Watches

Materials

Diamond, 15k Gold

Tiffany Co. Diamond Yellow Gold Crown Key Pendant
By Tiffany Co.
Located in Stamford, CT
Tiffany & Co 18k Yellow goldcrown key pendant. 47 round brilliant cut diamonds, approx. total
Category

21st Century and Contemporary Modern Necklace Enhancers

Materials

Diamond, 18k Gold, Yellow Gold

Tiffany Co. Diamond Platinum Oval Key Pendant
By Tiffany Co.
Located in New York, NY
Mint condition Platinum Chain Length: 16” Key dimension: 1.6” Diamonds: 0.58 carats of round cut
Category

2010s American Pendant Necklaces

Tiffany Co. 18k Gold Diamond Knot Key Pendant Charm
By Tiffany Co.
Located in San Fernando, CA
flowing form of this striking pendant is accentuated by dazzling diamonds. TIFFANY & CO. Key Collection
Category

21st Century and Contemporary Necklace Enhancers

Materials

Diamond, 18k Gold

Tiffany Co. 18K Rose Gold Diamond Daisy Key Necklace
By Tiffany Co.
Located in San Fernando, CA
with a single diamond accent. 18k rose gold a round single brilliant diamond 1.5" long Key Pendant 18
Category

21st Century and Contemporary Pendant Necklaces

Materials

Diamond, Rose Gold

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Diamond Key For Sale on 1stDibs

You are likely to find exactly the diamond key you’re looking for on 1stDibs, as there is a broad range for sale. Every item for sale was constructed with extraordinary care, often using Gold, 18k Gold and Yellow Gold. In our selection of items, you can find a vintage example as well as a contemporary version. Finding the perfect diamond key may mean sifting through those created during different time periods — you can find an early version that dates to the 19th Century and a newer variation that were made as recently as the 21st Century. For this particular accessory, there are many different carat weights to choose from, but .5 Carat and 1 Carat versions are of considerable interest. Creating a diamond key has been a part of the legacy of many jewelers, but those produced by Tiffany Co., Georgios Collections Inc and Butani are consistently popular. See these pages for a round cut iteration of this accessory, while there are also brilliant cut cut and princess cut cut versions available here, too. Most of our diamond key for sale are for women, but there are 117 pieces available to browse for men.

How Much is a Diamond Key?

The price for a diamond key starts at $95 and tops out at $49,000 with these necklaces, on average, selling for $3,000.

The Legacy of Diamond in Jewelry Design

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 ringsvintage engagement rings or Art Deco engagement rings

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