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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

Tiffany Co. 18k Gold Diamond Crown Key Pendant Necklace
By Tiffany Co.
Located in Los Angeles, CA
TIFFANY & Co. 18K Gold Diamond 1.5" Crown Key Pendant Necklace Metal: 18K yellow gold Weight
Category

2010s American Pendant Necklaces

Materials

Diamond, 18k Gold

Tiffany Co. Diamond Gold Platinum Petals Key Pendant Necklace
By Tiffany Co.
Located in Southampton, PA
Platinum & 18k White Gold Diamond Petals Key Pendant Necklace by Tiffany & Co. With 80 round
Category

2010s American Drop Necklaces

Materials

Diamond, 18k Gold, Platinum

Tiffany Co. Diamond Fleur-de-lis Platinum Key Pendant
By Tiffany Co.
Located in Litchfield, CT
iconic key collection, this discontinued Fleur-de-lis is gorgeous. The look of this pendant is
Category

Early 2000s American Pendant Necklaces

Materials

White Diamond, Platinum

18 Karat Yellow Gold and Diamond Greek Key Necklace
Located in Boca Raton, FL
This stunning 18 karat yellow gold Greek Key necklace features 6 stations of diamonds equaling
Category

21st Century and Contemporary Classical Greek Link Necklaces

Materials

White Diamond, 18k Gold

18K Yellow Gold Barry Peters Diamond Piano Keys Necklace
Located in New York, NY
diamond bib necklace encrusted with white and yellow diamonds with black onyx piano keys. Crafted in 18K
Category

20th Century British Modern Choker Necklaces

Materials

Diamond, Yellow Gold

Tiffany Co. Platinum Victoria Diamond Vine Key Circle Pendant Medium
By Tiffany Co.
Located in New York, NY
Tiffany & Co. Key Pendant from the Victoria Vine Collection, a true masterpiece of fine
Category

21st Century and Contemporary American Modern Pendant Necklaces

Materials

White Diamond, Diamond, Platinum

Tiffany Co. Platinum Diamond Fleur De Lis Key Pendant Necklace
By Tiffany Co.
Located in Los Angeles, CA
TIFFANY & Co. Platinum Diamond 1.5" Fleur de Lis Key Pendant Necklace 16" Metal: Platinum Chain
Category

2010s American Pendant Necklaces

Materials

Diamond, Platinum

TIFFANY Co. Platinum Diamond Fleur De Lis Key Pendant Necklace
By Tiffany Co.
Located in Los Angeles, CA
TIFFANY & Co. Platinum Diamond 1.5" Fleur de Lis Key Pendant Necklace 16" Metal: Platinum Chain
Category

2010s American Pendant Necklaces

Materials

Diamond, Platinum

Deakin Francis Sterling Silver Skull Key Ring with Diamond Eyes
By Deakin Francis
Located in Firenze, IT
drops its jaw and the genuine diamond eyes pop out in amazement at the discovery. This unique key ring
Category

2010s British Contemporary Cufflinks

Materials

Diamond, Sterling Silver

Tiffany Co. Diamond and Platinum Small Key Pendant and Necklace
By Tiffany Co.
Located in Tampa, FL
Tiffany & Co. Diamond and Platinum Small Key Pendant and Necklace 16 inch length platinum Tiffany
Category

2010s American Modern Pendant Necklaces

Materials

Diamond, Platinum

Theo Fennell Diamond Rubies Large Skeleton Key White Gold Pendant
By Theo Fennell
Located in Southampton, PA
18k White Gold Diamond Rubies Large Skeleton Key Pendant by Theo Fennell. With Round brilliant cut
Category

20th Century British More Jewelry

Materials

Diamond, 18k Gold

Tiffany Co. Diamond Black Enamel White Gold Key Pendant Necklace
By Tiffany Co.
Located in New York, NY
This elegant Tiffany & Co. necklace features a sparkling key pendant crafted in 18k white gold with
Category

2010s American Pendant Necklaces

Materials

Diamond, 18k Gold, White Gold

Victorian Diamond Enamel and 14 Karat Gold Watch Key Pendant
Located in Philadelphia, PA
A pocket watch key with a navette form top One side with blue enamel dot in a Celtic knot motif
Category

Antique Late 19th Century Unknown Victorian More Jewelry

Materials

Diamond, 14k Gold

14 Karat Yellow Gold Diamond Heart Key Pendant Necklace #16825
Located in Washington Depot, CT
14 Karat Yellow Gold and Diamond Heart Key Pendant Necklace This lovely heart key pendant necklace
Category

21st Century and Contemporary Pendant Necklaces

Materials

Diamond, 14k Gold, Yellow Gold

White Agate Fluer De Lis Key Pendant w/ 18k Diamonds
Located in New York, NY
White Agate Fluer De Lis Key Pendant w/ 18k & Diamonds **CHAIN NOT INCLUDED** Materials: White
Category

21st Century and Contemporary Pendant Necklaces

Materials

Agate, Diamond, 18k Gold

Tiffany Co. White Gold Diamond Atlas Pierced Key Chain Necklace
By Tiffany Co.
Located in Beverly Hills, CA
Tiffany & Co. Atlas Pierced Key pendant and chain necklace. Made of 18k white gold, featuring 4
Category

1990s Pendant Necklaces

Materials

Diamond, 18k Gold, White Gold

Tiffany Co. 18K White Gold Diamond Heart Key 1.5" #16091
By Tiffany Co.
Located in Washington Depot, CT
Tiffany & Co. 18K White Gold Diamond Heart Key 1.5" Tiffany & Co. diamond heart key in 18 karat
Category

21st Century and Contemporary Chain Necklaces

Materials

Diamond, Gold, 18k Gold, White Gold

GIA Certified 1.15 Carat Fancy Dark Brown Greenish Yellow Diamond
Located in บางรัก, TH
examine the diamond’s key characteristics based on internationally recognized standards
Category

2010s Asian Loose Gemstones

Materials

Yellow Diamond

Tiffany Co. Sterling Silver Daisy Key Pendant Necklace with Diamond
By Tiffany Co.
Located in New York, NY
Tiffany & Co. Key Necklace finely crafted in Sterling Silver with a key pendant measuring 1.5" long
Category

21st Century and Contemporary American Modern Link Necklaces

Materials

Diamond, Sterling Silver

Tiffany Co. 18 Karat Rose Gold Diamonds Atlas Key Pendant
By Tiffany Co.
Located in Los Angeles, CA
Type: Pendant Height: 48.5 mm Width:16 mm Metal: Rose Gold Metal Purity: 18K Stone Type: Diamond
Category

2010s Italian Pendant Necklaces

Materials

Diamond, 18k Gold

1980s Alexandre Reza Rolls Royce Diamond Gold Platinum Key Chain
Located in Geneva, CH
diamond. Back in black leather. Circa 1980. Signed Alexandre Reza. French assay marks and maker's mark
Category

Vintage 1980s French More Jewelry

Materials

Diamond, 18k Gold, Platinum

TIFFANY Co. Platinum Diamond 1.5" Fleur de Lis Key Pendant Necklace 16"
By Tiffany Co.
Located in Los Angeles, CA
TIFFANY & Co. Platinum Diamond 1.5" Fleur de Lis Key Pendant Necklace 16" Metal: Platinum Chain
Category

2010s American Pendant Necklaces

Materials

Diamond, Platinum

0.39 carats of Key Pendant
Located in New York, NY
Experience the epitome of modern elegance with our exquisite key-inspired pendant, expertly crafted
Category

2010s Indian Modern Pendant Necklaces

Materials

White Diamond, Pink Diamond, 18k Gold, Rose Gold

Tiffany Co. Key Pendant Necklace
By Tiffany Co.
Located in San Antonio, TX
18k Tiffany Key Pendant set with 3 diamonds and suspended from a. 30" Tiffany chain. Signed Tiffany
Category

2010s American Pendant Necklaces

Materials

Diamond

LB Exclusive White Gold Diamond Pave Heart Key Pendant Necklace
By LB Exclusive
Located in Southampton, PA
is set with a total of 0.05 carats of diamonds. Offered in brand new condition, this jewelry piece
Category

21st Century and Contemporary Pendant Necklaces

Materials

White Diamond, 14k Gold, White Gold

Jona Greek Key White Diamond 18 Karat White Gold Band Ring
By Jona
Located in Torino, Piedmont
Greek key design 18 karat white gold ring band, designed and crafted in Italy by Jona, featuring 2
Category

21st Century and Contemporary Italian Fashion Rings

Materials

White Diamond, Diamond, 18k Gold, White Gold

14 Karat Yellow Gold Octagon Key Chain with Diamond Initials GG
Located in Manhasset, NY
14 Karat Yellow Gold 5 inch Octagon Key Chain with Diamond Initials GG Octagon Size: 28x28 14.1
Category

2010s Modern More Jewelry

Materials

Diamond, 14k Gold

Georgios Collections 18 Karat Yellow Gold Diamond Greek Key Pendant Necklace
By Georgios Collections Inc
Located in Astoria, NY
forming a Greek Key design, which is the symbol of eternity. This stunning pendant features 2 brilliant
Category

21st Century and Contemporary Greek Classical Greek Pendant Necklaces

Materials

Diamond, White Diamond, Blue Diamond, Yellow Diamond, Pink Diamond, Blac...

Georgios Collections 18 Karat White Gold Diamond Reversible Greek Key Ring
By Georgios Collections Inc
Located in Astoria, NY
S. Georgios designer 18 Karat White Gold all Hand Made Reversible Diamond Ring with the Greek Key
Category

2010s Greek Classical Greek Cocktail Rings

Materials

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

Georgios Collections 18 Karat Yellow Gold Diamond Greek Key Hoop Earrings
By Georgios Collections Inc
Located in Astoria, NY
symbol of eternal life- the Greek Key Design. We have finished them on the outside with a bezel of white
Category

21st Century and Contemporary Greek Classical Greek Hoop Earrings

Materials

Diamond, White Diamond, Blue Diamond, Yellow Diamond, Pink Diamond, Blac...

Tiffany Co. Keys 18K Yellow Gold Natural Diamond Daisy Large Pendant 2.5"
By Tiffany Co.
Located in Baltimore, MD
Tiffany & Co. Keys 18 Karat Yellow Gold & Natural Diamond Daisy Large Pendant 2.5" Metal: 18k
Category

21st Century and Contemporary Modern Pendant Necklaces

Materials

Diamond, Yellow Gold

Tiffany Co. Diamond Blossom Flower Key Pendant in 18ct Yellow Gold
By Tiffany Co.
Located in London, GB
This beautiful diamond blossom flower key pendant is suspended from a 16" 18t yellow gold Tiffany
Category

2010s British Modern Pendant Necklaces

Materials

Diamond, 18k Gold, Yellow Gold

Tiffany Co. Diamond 18 Karat Rose Gold Knot Key Pendant Necklace
By Tiffany Co.
Located in Chipping Campden, GB
An iconic key pendant by Tiffany. The knot and teeth of the key are encrusted with round brilliant
Category

21st Century and Contemporary American Modern Pendant Necklaces

Materials

Diamond, 18k Gold, Rose Gold

1980s Greek Key Diamond and 14 Karat Yellow Gold Band Ring
Located in Hicksville, NY
1980s Diamond and 14 Karat Yellow Gold Band Ring with Greek Key Pattern The ring features a bold
Category

Late 20th Century Unknown Modern Band Rings

Materials

Diamond, 14k Gold, Yellow Gold

2 Carat Diamond Crown Key Shape Pendant 14 Karat White Gold
Located in Great Neck Plaza, NY
Beautiful shiny, 2 cttw Crown Key Shape Pendant 14 Karat White Gold. average Color H-I, Clarity SI
Category

2010s American Pendant Necklaces

Materials

Diamond, 14k Gold, White Gold

Chakra Key Silver Pendant Gold Plated Necklace White Diamond Emerald Ruby
By J DAUPHIN
Located in Los Angeles, CA
Chakra Key Silver Pendant Gold Plated Necklace White Diamond Emerald Ruby J DAUPHIN necklace
Category

2010s American Contemporary Chain Necklaces

Materials

Citrine, White Diamond, Emerald, Ruby, Blue Sapphire, Tanzanite, Gold Pl...

Tiffany Co. Key Blossom Pendant Necklace in 18k rose Gold with Diamond
By Tiffany Co.
Located in Aventura, FL
Unlock a world of elegance and sophistication with the Tiffany & Co. Key Pendant Necklace, crafted
Category

1990s Modern Pendant Necklaces

Materials

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

Georgios Collections 18 Karat Yellow and White Gold Diamond Greek Key Pendant
By Georgios Collections Inc
Located in Astoria, NY
beautiful pendant and chain necklace features 4 brilliant-cut White Diamonds total weight of 0.07 Carat
Category

21st Century and Contemporary Greek Classical Greek Drop Necklaces

Materials

Diamond, White Diamond, Blue Diamond, Yellow Diamond, Pink Diamond, Blac...

Tiffany Co. 18 Karat Rose Gold Diamond Multi Gemstone Heart Key Pendant
By Tiffany Co.
Located in Baltimore, MD
Tiffany & Co. 18 Karat Rose Gold Diamond Multi Gemstone Heart & Key Pendant Metal: 18 Karat rose
Category

21st Century and Contemporary Modern Necklace Enhancers

Materials

Diamond, Multi-gemstone, Rose Gold

Tiffany Co. Large Daisy Diamond Platinum Key Pendant Long Oval Link Chain
By Tiffany Co.
Located in Tampa, FL
An iconic Tiffany & Co. pendant and necklace, this Daisy Key Pendant is crafted in platinum with
Category

2010s American Modern Pendant Necklaces

Materials

Diamond, White Gold, Platinum

Tiffany Co. Crown Key 18 Karat White Gold .11 Ctw Diamond Necklace
By Tiffany Co.
Located in Houston, TX
Tiffany & Co. "Crown Key" pendant necklace set in 18 Karat White gold with total diamond carat
Category

21st Century and Contemporary American Pendant Necklaces

Materials

Diamond, 18k Gold, White Gold

Georgios Collections 18 Karat Yellow Gold Diamond Sapphire Greek Key Band Ring
By Georgios Collections Inc
Located in Astoria, NY
S.Georgios designer 18 Karat Yellow Gold Ring featuring the Greek Key design symbolizing eternity
Category

21st Century and Contemporary Greek Classical Greek Band Rings

Materials

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

Diamond Pave Heart Lock and Key Gold Pendant Necklace Estate Fine Jewelry
Located in Montreal, QC
Beautiful and Finely Detailed Pave Diamond Heart Lock and dangling Key Pendant, set with round
Category

20th Century Contemporary Pendant Necklaces

Materials

Diamond, Gold, 18k Gold

Georgios Collections 18 Karat White Gold Diamond Sapphire Ruby Emerald Key Ring
By Georgios Collections Inc
Located in Astoria, NY
S.Georgios designer 18 Karat White Gold Ring featuring the Greek Key design symbolizing eternity
Category

2010s Greek Classical Greek Band Rings

Materials

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

Georgios Collections 18 Karat White Gold Diamond Sapphire Ruby Emerald Key Ring
By Georgios Collections Inc
Located in Astoria, NY
S.Georgios designer 18 Karat White Gold Ring featuring the Greek Key design symbolizing eternity
Category

2010s Greek Classical Greek Band Rings

Materials

Diamond, White Diamond, Emerald, Ruby, Sapphire, Blue Sapphire, Gold, 18...

Georgios Collections 18 Karat Gold Double Headed Eagle Diamond Coin Key Pendant
By Georgios Collections Inc
Located in Astoria, NY
S.Georgios designer 18 Karat Yellow Gold Double-Headed Eagle Diamond Coin Pendant is all handmade
Category

21st Century and Contemporary Greek Classical Greek Necklace Enhancers

Materials

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

Deakin Francis Sterling Silver Skull Key Ring with Diamond Eyes
By Deakin Francis
Located in Firenze, IT
diamond eyes pop out in amazement at the discovery. This unique key ring comes packaged in our beautiful
Category

21st Century and Contemporary British Contemporary Cufflinks

Materials

Sterling Silver

Georgios Collections 18 Karat White Gold Diamond Sapphire Ruby Emerald Key Ring
By Georgios Collections Inc
Located in Astoria, NY
S.Georgios designer 18 Karat White Gold band Ring featuring the Greek Key design symbolizing
Category

21st Century and Contemporary Greek Classical Greek Band Rings

Materials

Diamond, White Diamond, Emerald, Ruby, Sapphire, Blue Sapphire, Multi-ge...

Georgios Collections 18 Karat Yellow Gold Diamond Ring with the Greek Key Design
By Georgios Collections Inc
Located in Astoria, NY
S. Georgios 18 Karat Yellow Gold Hand Made Diamond Ring with the Greek Key design that symbolizes
Category

2010s Greek Classical Greek Band Rings

Materials

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

Georgios Collections 18 Karat Yellow Gold Diamond Ring with the Greek Key Design
By Georgios Collections Inc
Located in Astoria, NY
S. Georgios designer 18 Karat Yellow Gold Hand Made Diamond Ring with the Greek Key design that
Category

2010s Greek Classical Greek Band Rings

Materials

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

Georgios Collections 18 Karat Yellow Gold Diamond the Greek Key Design Band Ring
By Georgios Collections Inc
Located in Astoria, NY
S. Georgios designer 18 Karat Yellow Gold Hand Made Diamond Ring with the Greek Key design that
Category

21st Century and Contemporary Greek Classical Greek Band Rings

Materials

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

Tiffany Co. 0.13 Carat Diamond Crown Key on Chain 18 Karat in Stock
By Tiffany Co.
Located in Boca Raton, FL
Material: 18k rose gold Diamond Details: Approx. 0.13ctw round cut diamond. Diamond is G/H in color
Category

21st Century and Contemporary American Pendant Necklaces

Materials

Diamond, White Diamond, 18k Gold, Rose Gold

Tiffany Co. Heart Key Pendant with Diamonds and Chain in 18 Karat Yellow Gold
By Tiffany Co.
Located in New York, NY
Tiffany & Co. Heart Key pendant with Diamonds and 20 inch oval link chain in 18K Yellow Gold Key is
Category

2010s American Contemporary Pendant Necklaces

Materials

Diamond, White Diamond, 18k Gold

Diamond Heart and Key Designer Bracelet in 18 Karat Yellow and White Gold
By Assor Gioielli
Located in Honolulu, HI
charms. The design features three decorative key charms set with round diamonds and one Heart shape charm
Category

21st Century and Contemporary Italian Modern Charm Bracelets

Materials

Diamond, 18k Gold

18 Karat Yellow Gold and Round Pave Diamond Greek Key Motif Choker Necklace
Located in Scottsdale, AZ
This bold, unique estate necklace featuring a diamond embellished Greek medallion is a real
Category

20th Century Greek Choker Necklaces

Materials

Diamond, 18k Gold, Yellow Gold

Tiffany Co. 1.44 ct Round Cut Diamond Heart Lock Key Pendant in 18K
By Tiffany Co.
Located in Chicago, IL
Tiffany & Co. 1.44 ct Round Cut Diamond Heart Lock & Key Pendant in 18K White Gold. The pendant
Category

2010s American Pendant Necklaces

Materials

Diamond, 18k Gold, Platinum

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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.