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14 Karat Yellow Gold and Diamond Key Charm
Located in Washington Depot, CT
Vintage 14 Karat Yellow Gold and Diamond Key Charm- This sparkling skeleton key charm is decorated
Category

20th Century Pendant Necklaces

Materials

Diamond, Yellow Gold

14 Karat Yellow Gold and Diamond Key Pendant
Located in Washington Depot, CT
Vintage 14 Karat Yellow Gold and Diamond Key Pendant- This sparkling pendant features a skeleton
Category

20th Century Pendant Necklaces

Materials

Diamond, Yellow Gold

RCI Sterling Silver 14K Diamonds Key Pendant #15129
Located in Washington Depot, CT
Sterling silver 14K diamonds key pendant by RCI. Beautiful sterling silver key with yellow gold
Category

20th Century Pendant Necklaces

Materials

White Diamond, Gold, Yellow Gold, Sterling Silver

Oval Sapphire Diamond Key Charm Pendant Necklace 1.60 CTTW 18KT White Gold G VS2
By Harbor Diamonds
Located in New York, NY
18 Karat white gold pendant featuring a diamond key motif with 5 blue Sapphires, 1.04 carats and 56
Category

2010s Contemporary Pendant Necklaces

Materials

Diamond, Blue Sapphire, Sapphire, 14k Gold, White Gold

Chopard 18 Carat Yellow Gold Necklace with Diamond Key Pendant
By Chopard
Located in New York, NY
An excellent Chopard 18ct yellow gold necklace with a diamond key pendant. The Key is set with a
Category

1990s Swiss Modern Pendant Necklaces

Materials

Diamond, 18k Gold

Aston Martin Diamond Key Chain
Located in New York, NY
A rare diamond Aston Martin keychain comprised of 18k yellow gold adorned with diamonds and framed
Category

21st Century and Contemporary More Jewelry

Materials

Diamond, 18k Gold

Vintage Theo Fennell Diamond Key Necklace in 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 British Modern Pendant Necklaces

Materials

Diamond, Gold, 18k Gold, White Gold

LB Exclusive 10K Rose Gold 0.05 Ct Diamond Key Pendant Necklace
By LB Exclusive
Located in Southampton, PA
This cute LB Exclusive 10K Rose Gold 0.05 ct Diamond Key Necklace is made with an 10K rose gold
Category

21st Century and Contemporary Pendant Necklaces

Materials

Diamond, Rose Gold

Tiffany Co Fleur De Lis Diamond Key Pendant Necklace Platinum 16 Inches
By Tiffany Co.
Located in New York, NY
Fabulous and chic, this dazzling Tiffany & Co Fleur De Lis Diamond Key Pendant Necklace is a
Category

2010s Modern Pendant Necklaces

Materials

Diamond, Platinum

Art Deco Diamond Key Charm Pendant
Located in London, GB
small key and set with thirteen rose cut diamonds. It could either be added to a bracelet as a charm or
Category

Vintage 1930s Charm Bracelets

Materials

Diamond, Platinum

Tiffany Co. Diamond Key Pendant Necklace
By Tiffany Co.
Located in London, GB
pendant is crafted in platinum in the form of a key and features 36 sparkling round brilliant cut diamonds
Category

21st Century and Contemporary Pendant Necklaces

Materials

Diamond, Platinum

Platinum Gold Diamond Key Charm Bracelet
Located in London, GB
with three round brilliant cut diamonds. The bracelet marked 'PLAT'. Bracelet 7" long, key charm 1" by
Category

20th Century Unknown Art Deco Charm Bracelets

Materials

Diamond, 18k Gold, Platinum

Diamond Key To My Heart Brooch
Located in Amsterdam, NL
A silver key to my heart brooch with gold backing set with pretty brilliant cut diamonds (app. 2.25
Category

Antique Late 19th Century English Victorian Brooches

Materials

Diamond, 18k Gold, Sterling Silver

Tiffany Co. Platinum Diamond Key Pendant
By Tiffany Co.
Located in Scottsdale, AZ
Designer: Tiffany & Co. Material: platinum Diamond: 38 round brilliant cut = 0.70cttw Color: G
Category

21st Century and Contemporary Pendant Necklaces

Materials

Diamond, Platinum

Vintage Tiffany Co. Diamond Key Pendant Set in 18k Yellow Gold
By Tiffany Co.
Located in London, England
A beautiful vintage Tiffany & Co. diamond key pendant set in 18k yellow gold. The pendant depicts
Category

2010s Unknown Modern Pendant Necklaces

Materials

Diamond, Gold, 18k Gold, Yellow Gold

Fine Ladies Diamond Key 14 Karat Italy Necklace Certified
Located in Brooklyn, NY
#201822588 CERTIFIED $2,500 FINE QUALITY DIAMOND KEY PENDANT LARGE 16 INCHES IN LENGTH NECKLACE
Category

2010s Modern Beaded Necklaces

Materials

Diamond, 14k Gold

10 Carat Diamonds Key Necklace / Pin 18 Karat White Gold Designer Balestra
By BALESTRA
Located in New York, NY
10 Carats Diamonds Key Necklace / Pin 18 Karat White Gold Designer Balestra Amazing Key Necklace
Category

Vintage 1970s Drop Necklaces

Materials

Diamond, 18k Gold

Theo Fennell Princess Cut Diamond Key Pendant
By Theo Fennell
Located in London, GB
princess cut diamonds, channel set in the key. The diamonds have a combined weight of 0.20 carat and are F
Category

21st Century and Contemporary Unknown Pendant Necklaces

Materials

Diamond, 18k Gold

Tiffany Co. Daisy Platinum Diamond Key Pendant
By Tiffany Co.
Located in New York, NY
Brilliant beacons of optimism and hope, Tiffany Keys are radiant symbols of a bright future. Set
Category

21st Century and Contemporary American Modern Pendant Necklaces

Materials

Diamond, Platinum

Tiffany Co. Platinum Diamond Key pendant Necklace
By Tiffany Co.
Located in Chicago, IL
Circa 2015 Tiffany Company Platinum Key Pendant, measuring 1 1/4 inch in length and set with
Category

2010s American Pendant Necklaces

Materials

Diamond, Platinum

Yellow Gold Ruby Diamond Key Lock Ring
Located in Mayfair, London, London
with a diamond set loop in the centre. Attached to the loop are 2 diamond set key charms and a ruby set
Category

21st Century and Contemporary Fashion Rings

Materials

Diamond, Ruby, 18k Gold, Yellow Gold

Tiffany Co. Fleur de Lis Diamond Key Pendant Necklace 18 Karat Gold Estate
By Tiffany Co.
Located in Torrance, CA
Elegant and finely detailed estate Tiffany & Co medium Fleur de Lis diamond key pendant & necklace
Category

Mid-20th Century Unknown Modern Pendant Necklaces

Materials

Diamond, 14k Gold, Rose Gold

Vintage Tiffany Co. Yellow Diamond Key Pendant Set in Platinum and Gold
By Tiffany Co.
Located in London, England
A beautiful vintage Tiffany & Co. yellow and white diamond key pendant set in platinum and 18k
Category

2010s Unknown Modern Pendant Necklaces

Materials

Diamond, White Diamond, Yellow Diamond, Gold, 18k Gold, Yellow Gold, Pla...

Fine Ladies Diamond Key 14k White Gold Italy Necklace 0.40 TCW Certified
Located in Brooklyn, NY
Natural Finely Faceted Quality Diamond Key Necklace 14 Kt Gold 16" Italy Certified $2,500 822588
Category

2010s Modern Beaded Necklaces

Materials

Diamond, 14k Gold, White Gold

Meira T Diamond Key and Lock Pendant Necklace
By Meira T
Located in Boca Raton, FL
Material: 14k white gold Diamond Details: Approximately 0.19ctw of round diamonds. Diamonds are G/H
Category

2010s American Pendant Necklaces

Materials

Diamond, White Diamond, 14k Gold, White Gold

Tiffany Co. Platinum Diamond Key Pendant Necklace 1.18 Carat
By Tiffany Co.
Located in New York, NY
Tiffany & Co. key pendant which is made in fine platinum and pave-set with 1.18 carats of round
Category

2010s American Modern Pendant Necklaces

Materials

Diamond, Platinum

Tiffany Co. 18 Karat White Gold Diamond Key Necklace
By Tiffany Co.
Located in Scottsdale, AZ
Designer: Tiffany & Co. Material: 18K white gold Diamond: 3 round cut = .10cttw Color: G Clarity
Category

21st Century and Contemporary Pendant Necklaces

Materials

Diamond, 18k Gold, White Gold

Tiffany Co. Platinum and Diamond Key Pendant Charm Modern
By Tiffany Co.
Located in Beverly Hills, CA
) Gemstone: 0.35 points of single cut diamonds Condition: Great Signature: Tiffany & Co / Pt 950
Category

1990s American More Jewelry

Materials

Diamond, Platinum

Lock Key Diamond Necklace 14 Karat White Gold Natural Diamonds Key Lock
Located in Brooklyn, NY
Pave Diamond Necklace Pendant Diamonds all around the lock, Total 3.50 carat. set in 14k white Gold
Category

2010s Pendant Necklaces

Materials

Diamond, 14k Gold, White Gold

LB Exclusive 14k Rose Gold 0.10 Ct Diamond Key Bracelet
By LB Exclusive
Located in Southampton, PA
. The key’s heart is also dotted with shimmering diamonds totaling 0.10 carats for added luxury
Category

21st Century and Contemporary Chain Bracelets

Materials

Diamond, Rose Gold, 14k Gold

Tiffany Co Kaleidoscope Fancy Pink White Diamond Key Pendant Platinum Necklace
By Tiffany Co.
Located in Southampton, PA
Platinum Fancy Pink And White Diamond Kaleidoscope Key Pendant Necklace by Tiffany & Co. With Round
Category

2010s American Pendant Necklaces

Materials

White Diamond, Pink Diamond, Platinum

LB Exclusive 10K Yellow Gold 0.05 Ct Diamond Key Pendant Necklace
By LB Exclusive
Located in Southampton, PA
17.5” chain. On the key you’ll also find a series of glittering diamonds with a total weight of 0.05
Category

21st Century and Contemporary Pendant Necklaces

Materials

Diamond, Yellow Gold

LB Exclusive 14 Karat White Gold 3.50 Carat Diamond Key Pendant
By LB Exclusive
Located in Southampton, PA
This LB Exclusive key pendant is made of 14K white gold and embellished with diamonds that amount
Category

21st Century and Contemporary More Jewelry

Materials

Diamond, White Gold

LB Exclusive 18K White Gold 0.17 Ct Diamond Key Pendant Necklace
By LB Exclusive
Located in Southampton, PA
This breathtaking pendant necklace is inherently elegant. The captivating key-shaped pendant
Category

21st Century and Contemporary Pendant Necklaces

Materials

Diamond, White Gold

Chopard Happy Diamonds Key To My Heart Yellow Gold Charm Bracelet
By Chopard
Located in Southampton, PA
floating diamond. Lastly, next to the large heart charm is a very small key charm. Diamond Carat Weight
Category

20th Century Swiss Charm Bracelets

Materials

Diamond, 18k Gold, Yellow Gold

4.70 Carat Diamond Key Pendant on Necklace 18 Karat White Gold
Located in Scottsdale, AZ
Designer: custom design Material: 18k white gold Diamonds: 470 round brilliant cuts = 4.70 carat
Category

21st Century and Contemporary American Modern Pendant Necklaces

Materials

Diamond, 18k Gold, White Gold

14 Karat Two-Tone Bracelet with Diamond Key and Lock Charms
Located in Scottsdale, AZ
Designer: custom Material: 14k yellow and white gold Diamonds: 27 round brilliant cut = .40cttw
Category

21st Century and Contemporary Link Bracelets

Materials

Diamond, 14k Gold, White Gold, Yellow Gold

Tiffany Co. Fleur-de-Lis Key Diamond White Gold Pendant Necklace
By Tiffany Co.
Located in Southampton, PA
18k White Gold Diamond Fleur De Lis Diamond Key Pendant by Tiffany & Co. With Round brilliant cut
Category

21st Century and Contemporary American Pendant Necklaces

Materials

Diamond, 18k Gold

Tiffany Co. Fleur-de-Lis Key Diamond Rose Gold Pendant Necklace
By Tiffany Co.
Located in Southampton, PA
18k Rose Gold Diamond Fleur De Lis Diamond Key Pendant by Tiffany & Co. With Round brilliant cut
Category

21st Century and Contemporary American Pendant Necklaces

Materials

Diamond, 18k Gold

Tiffany Co. Fleur-de-Lis Key Diamond Rose Gold Pendant Necklace
By Tiffany Co.
Located in Southampton, PA
18k Rose Gold Diamond Fleur De Lis Diamond Key Pendant by Tiffany Co. With Round brilliant
Category

21st Century and Contemporary American Pendant Necklaces

Materials

Diamond, 18k Gold

Judith Ripka Sterling Silver Cable Collection Necklace with Diamonique Key
Located in Scottsdale, AZ
measures 18 inches long, diamond key is 3/4-inches long and 1/4-inches wide Weight: 49.50 grams Retail
Category

21st Century and Contemporary Unknown Chain Necklaces

Materials

Sterling Silver

Louis Vuitton Locket" Padlock The Keys" Diamond Pendant
By Louis Vuitton
Located in New York, NY
LV Locket" Padlock & The Keys" diamond pendant/necklace in 18k yellow gold. The necklace features
Category

21st Century and Contemporary French Artist Pendant Necklaces

Materials

Diamond, 18k Gold

Tiffany Co. Diamond 18K Gold Modern Open Round Key Pendant Necklace
By Tiffany Co.
Located in London, GB
. designer resale item. This item comes with original box and case. Details Gold Necklace 18k Diamond Key
Category

21st Century and Contemporary British Pendant Necklaces

Materials

Diamond, 18k Gold

Tiffany Co. Tiffany Keys Diamond Platinum Key Pendant
By Tiffany Co.
Located in Southampton, PA
. This pendant from the Tiffany Keys collection is a perfect example of their exceptional jewelry-making
Category

21st Century and Contemporary American Necklace Enhancers

Materials

White Diamond, Platinum

Art Deco Platinum Charm Bracelet
Located in Los Angeles, CA
with ruby eye, diamond key, diamond I LOVE U, interlocking diamond hearts and a diamond horseshoe
Category

Early 20th Century Art Deco Charm Bracelets

Vintage 1980 s 11.00ct Aquamarine and Diamond Cocktail Ring Set in Platinum
Located in London, GB
aquamarine has a beautiful blue colouring and contrasts perfectly against the diamonds. Key Features
Category

Vintage 1980s Cocktail Rings

Materials

Aquamarine, Diamond, Platinum

Tiffany Co. Diamond ‘Atlas’ Key Pendant
By Tiffany Co.
Located in London, GB
From the designer Tiffany & Co. comes this key pendant from their iconic Atlas collection. Crafted
Category

21st Century and Contemporary British Pendant Necklaces

Materials

Diamond, 18k Gold, Yellow Gold, Platinum

Tiffany Co. Diamond Clover Key Pendant
By Tiffany Co.
Located in London, GB
forms part of Tiffany's iconic 'Keys' collection and is the 'Four Leaf Clover' model. Condition: Used
Category

21st Century and Contemporary Pendant Necklaces

Materials

Diamond, Gold, Yellow Gold

Chopard Happy Diamond Gold Key Pendant
By Chopard
Located in Feasterville, PA
“Who holds the key to your heart?” Inside the transparent heart design itself rests a single
Category

Early 2000s Necklace Enhancers

Materials

Diamond, 18k Gold, Yellow Gold

Diamond Heart Key Gold Pendant Necklace
Located in Beverly Hills, CA
diamond heart key 18k gold pendant with a 14k gold chain necklace. The key-shaped pendant featuring a
Category

Late 20th Century Chain Necklaces

Materials

Diamond, 14k Gold, 18k Gold

Tiffany Co. Diamond Heart Key Necklace
By Tiffany Co.
Located in London, GB
piece 18ct white gold forms part of the Tiffany Key collection and showcases an ornate open head which
Category

21st Century and Contemporary Pendant Necklaces

Materials

Diamond, 18k Gold, White Gold

Mercedes Emblem Diamond Gold Key Chain
Located in Boca Raton, FL
Mercedes emblem keychain features 30 round brilliant cut diamonds that are set into 18 karat
Category

21st Century and Contemporary Modern More Objets d Art and Vertu

Materials

White Diamond, 18k Gold

Tiffany Co. Diamond Platinum Oval Key Pendant
By Tiffany Co.
Located in Beverly Hills, CA
A Tiffany & Co. key pendant featuring 0.58 carats of round cut diamonds. Set in platinum. See
Category

2010s Pendant Necklaces

Materials

Diamond, White Diamond, Platinum

Greek Key Pattern Diamond Gold Necklace
Located in New York, NY
Made of 18k yellow & white gold, this necklace is set with sparkling round cut diamonds that weigh
Category

Vintage 1980s More Necklaces

Materials

Diamond, 18k Gold, White Gold, Yellow Gold

Diamond Greek Key Filigree Dinner Ring
Located in Montgomery, AL
). This 18k white gold ring features 9 absolutely gorgeous sparkling white diamonds as well as extensive
Category

Early 20th Century Unknown Art Deco Cocktail Rings

Materials

Diamond, 18k Gold, White Gold

Tiffany Co. 18K Diamonds Bloom Key Pendant
By Tiffany Co.
Located in San Fernando, CA
Tiffany & Co. Bloom Key Pendant Brilliant beacons of optimism and hope, Tiffany Keys are radiant
Category

21st Century and Contemporary Necklace Enhancers

Materials

Diamond

Tiffany Co. Diamond Platinum Key Pendant Necklace
By Tiffany Co.
Located in Southampton, PA
. The necklace is made of platinum and boasts a key-shaped motif set with a glimmering diamond pave
Category

21st Century and Contemporary American Necklace Enhancers

Materials

Diamond, 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.