Skip to main content

Diamond Key

to
145
778
584
331
261
159
1,061
281
115
77
76
12
24
178
931
2
6
21
5
3
2
6
16
10
1
613
529
8
411
143
54
54
42
to
2
1
233
71
70
16
14
165
157
151
12
10
7
6
5
3
3
2
2
2
2
1,114
36
595
234
Sort By
Tiffany Co Keys Platinum Necklace with Diamonds
By Tiffany Co.
Located in AMSTELVEEN, NH
Victoria Key Pendant. This stunning necklace, showcases a brilliant-cut diamond of 0.26 carats, boasting
Category

21st Century and Contemporary Pendant Necklaces

Materials

Diamond, Platinum

Tiffany Co. Petals 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

Diamond, Platinum

Tiffany Co. Large Key with 3 Diamonds
By Tiffany Co.
Located in Bethesda, MD
The Tiffany & Co Large Key with 3 Diamonds is a sophisticated and elegant pendant made of 18th
Category

2010s Pendant Necklaces

Materials

Diamond, White Gold

Tiffany Co Diamond Platinum Key Pendant Necklace
By Tiffany Co.
Located in Berlin, DE
Please note: The Tiffany chain is not included in the price of the key and is sold separately
Category

20th Century Pendant Necklaces

Materials

Diamond, Platinum

Syna Yellow Gold Key Pendant with Diamonds
By Syna Jewels
Located in Fort Lee, NJ
Created in 18 carat yellow gold Diamonds 0.12 carat approx. Chain sold separately Limited edition
Category

2010s Unknown Contemporary Pendant Necklaces

Materials

Diamond, Brown Diamond, 18k Gold, Yellow Gold

Gold and Diamond Lock and Key Pendant
Located in Mayfair, London, London
An 18k yellow floral gold key and lock pendant. The key features a flower design head with a single
Category

21st Century and Contemporary Pendant Necklaces

Materials

Lapis Lazuli, Onyx, Tourmaline, Diamond, 18k Gold, Yellow Gold

Tiffany Co. 0.44ct Diamond Victoria Key Pendant
By Tiffany Co.
Located in London, GB
This beautiful ‘Victoria Key’ pendant comes from the designer Tiffany & Co. and features a diamond
Category

21st Century and Contemporary British Pendant Necklaces

Materials

Diamond, 18k Gold, Rose Gold

Spark Creations Diamond-set Lock Key Necklace
By Spark Creations
Located in Litchfield, CT
Circa 2000s, 18k, Spark Creations, New York. Rife with fine details and diamonds, we can't help but
Category

Early 2000s American Pendant Necklaces

Materials

Diamond, 18k Gold, White Gold

0.71 Carat Diamond Greek Key Pattern Bracelet
By Hakimi s Gem
Located in Chicago, IL
This elegant bracelet features round diamonds with a total carat weight of 0.71 ct, set in 14k
Category

21st Century and Contemporary Art Deco Link Bracelets

Materials

Diamond, 14k Gold, White Gold

Tiffany Co Diamond Kaleidoscope Key Platinum Pendant Necklace
By Tiffany Co.
Located in Southampton, PA
Platinum Diamond Kaleidoscope Key Pendant Necklace by Tiffany & Co. With Round Brilliant Cut VS1
Category

20th Century American Pendant Necklaces

Materials

Diamond, Platinum

Gold, Diamond and Mother of Pearl Key Pendant
Located in Amsterdam, NL
An 18 carat gold key pendant, the blade of the key is set with small diamonds and the bow of the
Category

Vintage 1980s Italian Pendant Necklaces

Materials

White Diamond, 18k Gold

Prince Dimitri Diamond Platinum Large Key Pendant Necklace
By Prince Dimitri
Located in Southampton, PA
Prince Dimitri and it boasts an imaginatively envisioned key pendant that is beautifully crafted from
Category

20th Century Pendant Necklaces

Materials

White Diamond, Platinum

Tiffany Co. Crown Key Diamond Gold Pendant Necklace
By Tiffany Co.
Located in Stamford, CT
Tiffany Keys crown key Diamond pendant on a Tiffany Co beaded chain. 18k yellow gold. 1
Category

1990s Pendant Necklaces

Materials

Diamond, 18k Gold, Yellow Gold

Tiffany Co. Diamond Platinum Oval Key Pendant Necklace
By Tiffany Co.
Located in Southampton, PA
Platinum Oval Key Pendant Necklace by Tiffany & Co. With 36 round brilliant cut diamonds VS1
Category

Early 2000s American Drop Necklaces

Materials

Diamond, Platinum

Tiffany Co Diamond Petals Key Platinum Pendant Necklace
By Tiffany Co.
Located in Southampton, PA
Platinum Diamond Petals Key Pendant Necklace by Tiffany & Co. With 113x Round brilliant cut white
Category

2010s American Pendant Necklaces

Materials

Diamond, Platinum

Tiffany Co. Diamond Platinum Key Charm, circa 1950
By Tiffany Co.
Located in Philadelphia, PA
Charm is designed as a stylized key Pavé set throughout by single cut diamonds weighing
Category

Mid-20th Century Retro Charm Bracelets

Materials

Diamond, Platinum

Estate Diamond Sapphire 18 Karat Gold Key Pendant
Located in Miami, FL
Feel the mystery and beauty of this Estate Diamond Sapphire 18K Gold Key Pendant! This charming
Category

Vintage 1980s Modern Pendant Necklaces

Materials

Diamond, Sapphire, 18k Gold

Golf Tee Key Chain Diamond and 18 Karat
Located in MIAMI, FL
Phenomenal one of a kind design. This 18k yellow gold Diamond Golf Tee is an amazing item! This
Category

Vintage 1980s Unknown Modern More Jewelry

Materials

Diamond, 18k Gold

Tiffany Co. White Gold Diamond Crown Key Pendant
By Tiffany Co.
Located in Mayfair, London, London
An elegant 18k white gold Crown Key pendant by Tiffany & Co. The pendant features a key motif pave
Category

21st Century and Contemporary Pendant Necklaces

Materials

Diamond, 18k Gold, White Gold

Large Tiffany Co Platinum Diamond Skeleton Key Pendant
By Tiffany Co.
Located in New York, NY
Stunning iconic large Tiffany & Co platinum diamond skeleton key pendant set with 103 round
Category

2010s American Modern Pendant Necklaces

Materials

Diamond, Platinum

Tiffany Co. Rose Gold Diamond Modern Key Pendant
By Tiffany Co.
Located in Mayfair, London, London
A charming 18k rose gold diamond pendant by Tiffany & Co. from the Tiffany Keys collection. The
Category

21st Century and Contemporary American Pendant Necklaces

Materials

Diamond, 18k Gold, Rose Gold

Platinum Penthouse Diamond and Sapphire Pet Key Pendant
Located in Scottsdale, AZ
Designer: custom Material: platinum Diamond: 4 round brilliant cut = 0.15cttw Color: G Clarity: SI1
Category

21st Century and Contemporary Pendant Necklaces

Materials

Diamond, Sapphire, Platinum

18 Karat Yellow Gold Diamond Greek Key Ring
Located in Scottsdale, AZ
Designer: custom Material: 18K yellow gold Diamond: round cut = 0.47cttw Color: G Clarity: SI1-2
Category

21st Century and Contemporary Band Rings

Materials

Diamond, 18k Gold, Yellow Gold

Tiffany Co. Contemporary Diamond Sterling Silver Heart Key Necklace
By Tiffany Co.
Located in Philadelphia, PA
Necklace designed as cable chain suspending skeleton style key Featuring puffy heart motif head
Category

Late 20th Century Contemporary Pendant Necklaces

Materials

Diamond, White Diamond, Silver, Sterling Silver

Tiffany Co. Fleur de Lis Diamond Platinum Key Pendant
By Tiffany Co.
Located in Stamford, CT
Estate Fleur De Lis key diamond pendant in Platinum with bright white sparkly diamonds. 36 round
Category

21st Century and Contemporary Modern Necklace Enhancers

Materials

Diamond, Platinum

1950s Platinum, Diamond and Emerald Cat and Key Brooch
Located in New York, NY
, diamond crusted cat balanced on the emerald shank of an ornate key. The piece has 220 round-cut diamonds
Category

Vintage 1950s Brooches

Materials

Diamond, Emerald, Platinum

Tiffany Co. Diamond Rose Gold Crown Key Pendant Necklace
By Tiffany Co.
Located in Hicksville, NY
Tiffany Co Crown Key Pendant Necklace Forty Five Precision-Set Diamonds Diamonds are 0.45
Category

1990s Unknown Pendant Necklaces

Materials

Diamond, 18k Gold

Tiffany Co. Diamond Platinum Large Petal Key Pendant Necklace
By Tiffany Co.
Located in Boca Raton, FL
Tiffany & Company's signature large diamond petal key pendant fashioned in platinum. The Tiffany
Category

21st Century and Contemporary American Modern Pendant Necklaces

Materials

White Diamond, Platinum

14K White Gold 0.10ct Diamond Lock and Key Necklace
By LB Exclusive
Located in Southampton, PA
necklace chain are two pendants - a lock and a key - both detailed with petite diamonds.This brand new 14K
Category

21st Century and Contemporary More Necklaces

Materials

Diamond, White Gold, 14k Gold

14K Yellow Gold 0.10ct Diamond Lock and Key Necklace
By LB Exclusive
Located in Southampton, PA
necklace chain are two pendants - a lock and a key - both detailed with petite diamonds.This brand new 14K
Category

21st Century and Contemporary More Necklaces

Materials

Diamond, Yellow Gold, 14k Gold

14K Yellow Gold 0.10ct Diamond Lock and Key Necklace
By LB Exclusive
Located in Southampton, PA
necklace chain are two pendants - a lock and a key - both detailed with petite diamonds.This brand new 14K
Category

21st Century and Contemporary More Necklaces

Materials

Diamond, 14k Gold, Yellow Gold

Tiffany Co. Platinum 1.18ctw Diamond Petals Key Pendant Necklace
By Tiffany Co.
Located in Boca Raton, FL
This Tiffany & Co. Platinum 1.18ctw Diamond Petals Key Pendant Necklace is in excellent condition
Category

21st Century and Contemporary American Modern Pendant Necklaces

Materials

Diamond, Platinum

Tiffany Co Crown Diamond Large Key Platinum Pendant Necklace
By Tiffany Co.
Located in Southampton, PA
Platinum Diamond Crown Key Large Pendant Necklace by Tiffany & Co. With 62 Round brilliant cut
Category

2010s American Pendant Necklaces

Materials

Diamond, Platinum

14K Yellow Gold and Diamond Heart Key Pendant #16204
Located in Washington Depot, CT
Vintage 14K Yellow Gold and Diamond Heart Key Pendant Certified- This stunning heart key pendant
Category

21st Century and Contemporary Pendant Necklaces

Materials

Diamond, 14k Gold, Yellow Gold

Tiffany Co. Platinum Diamond Heart Tiffany Key Pendant Necklace
By Tiffany Co.
Located in Bishop s Stortford, Hertfordshire
Code: COM2101 Brand: Tiffany & Co. Description: Platinum Diamond Heart Tiffany Key Pendant Necklace
Category

21st Century and Contemporary Modern Pendant Necklaces

Materials

White Diamond, Platinum

Tiffany Co. Platinum Diamond Heart Tiffany Key Pendant Necklace
By Tiffany Co.
Located in Bishop s Stortford, Hertfordshire
Code: COM2101 Brand: Tiffany & Co. Description: Platinum Diamond Heart Tiffany Key Pendant Necklace
Category

21st Century and Contemporary Modern Pendant Necklaces

Materials

White Diamond, Platinum

Tiffany Co. Fleur De Lis Diamond Set Key Pendant
By Tiffany Co.
Located in Mayfair, London, London
An elegant diamond set pendant from the Tiffany Co Keys collection in platinum. The key shape
Category

21st Century and Contemporary Pendant Necklaces

Materials

Diamond, Freshwater Pearl, Rose Gold, Platinum

Tiffany Co. Diamond Set 18ct Rose Gold Keys Pendant
By Tiffany Co.
Located in Bishop s Stortford, Hertfordshire
Tiffany & Co. Diamond Set 18ct Rose Gold Keys Pendant Brand- Tiffany & Co. Model- Key Pendant
Category

21st Century and Contemporary Pendant Necklaces

Materials

Diamond, 18k Gold, Rose Gold

14 Karat White Gold Diamond and Sapphire Key Pendant
By Gregory Mikaelian Sons, Inc.
Located in Los Angeles, CA
14k white gold diamond and sapphire key pendant, containing 1 round blue sapphire of gem quality
Category

2010s American Contemporary Pendant Necklaces

Materials

Diamond, Sapphire, 14k Gold

Tiffany Co. 0.51 Carat Diamond Platinum Quatrefoil Key Pendant Necklace
By Tiffany Co.
Located in Philadelphia, PA
Necklace designed as stylized skeleton key pendant suspended from 1.0 mm cable chain Pendant
Category

Late 20th Century Contemporary Pendant Necklaces

Materials

Diamond, White Diamond, Platinum

Tiffany Co. 0.51 Carat Diamond Platinum Quatrefoil Key Pendant Necklace
By Tiffany Co.
Located in Philadelphia, PA
Necklace designed as stylized skeleton key pendant suspended from 1.0 mm cable chain Pendant
Category

Late 20th Century Contemporary Pendant Necklaces

Materials

Diamond, White Diamond, Platinum

Tiffany Co. Keys Yellow Gold Diamond Wire Bracelet 0.18 TDW
By Tiffany Co.
Located in Mayfair, London, London
An 18k yellow gold diamond wire bracelet from the Tiffany Keys collection by Tiffany & Co. The
Category

2010s Bangles

Materials

Diamond, Yellow Gold

Art Deco 1.25 Carats Diamond Platinum Greek Key Dinner Ring
Located in Philadelphia, PA
Elongated dinner ring is pierced with Greek key meandering and accented by milgrain edges
Category

Vintage 1930s Art Deco Cocktail Rings

Materials

Diamond, White Diamond, Platinum

Tiffany Co. Diamond 18 Karat Yellow Gold Quatrefoil Key Pendant
By Tiffany Co.
Located in Philadelphia, PA
Pendant designed as skeleton style key centering high polished pierced quatrefoil motif With
Category

Late 20th Century Contemporary Pendant Necklaces

Materials

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

Contemporary Amethyst Diamond 18 Karat White Gold Greek Key Ring
Located in Philadelphia, PA
purple color With a diamond halo surround and diamond accented shoulders Round brilliant cut diamonds
Category

Early 2000s Contemporary Cluster Rings

Materials

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

Vintage 14 Karat White Gold and Diamond Heart Key Pendant
Located in Washington Depot, CT
Vintage 14 Karat White Gold and Diamond Heart Key Pendant- This sparkling pendant features 42
Category

20th Century Pendant Necklaces

Materials

Diamond, White Gold

Tiffany Co. Contemporary 1.76 CTW Diamond Platinum Petals Key Pendant
By Tiffany Co.
Located in Philadelphia, PA
Designed as a stylized key with a pierced floral motif head Bead set throughout with round
Category

21st Century and Contemporary Contemporary Pendant Necklaces

Materials

Diamond, Platinum

Tiffany Co. Diamond Platinum Fleur De Lis Key Pendant Necklace
By Tiffany Co.
Located in Philadelphia, PA
Pendant designed as skeleton style key with head as a scrolling fleur de lis motif Set throughout
Category

Late 20th Century Contemporary Pendant Necklaces

Materials

Diamond, Platinum

Tiffany Co. Key-Shaped Pendant with 18 Karat Gold, Diamond
By Tiffany Co.
Located in New York, NY
authentic Tiffany platinum key pendant glows with yellow diamonds, approx. 0.5ct, fancy light, illuminating
Category

2010s American Modern Pendant Necklaces

Materials

Yellow Diamond, 18k Gold

Rare Tiffany Co. Fleur de Lis Diamond Platinum Key Pendant Necklace
By Tiffany Co.
Located in Birmingham, GB
Tiffany & Co. 'Fleur de Lis' Diamond Platinum 1.5 Inch Key Pendant Necklace. A beautiful and rare
Category

21st Century and Contemporary Pendant Necklaces

Materials

Diamond, White Diamond, Platinum

.925 Sterling Silver 1/3 Ctw Diamond Studded Key 18" Pendant Necklace
Located in New York, NY
, where each element articulates sophistication and exclusivity. Crafted with precision, the key-shaped
Category

21st Century and Contemporary Indian Modern Pendant Necklaces

Materials

Diamond, White Diamond, Rhodium, Sterling Silver

Edwardian Sapphire Diamond Ring with Greek Key Design in Platinum
Located in New York, NY
sapphires, a filigree Greek key design, and a diamond-set border, in platinum. Atw center stone 0.75 ct., J
Category

Early 20th Century Edwardian Fashion Rings

Materials

Diamond, Sapphire, Platinum

14 Karat White Gold Diamond and Sapphire Paved Key Pendant
Located in Los Angeles, CA
14k white gold diamond and sapphire paved key pendant, containing Specifications: main stone
Category

2010s American Contemporary Pendant Necklaces

Materials

Diamond, Sapphire, 14k Gold

1970s Diamond White Enamel Greek Key 18 Karat Bangle Bracelet
Located in Miami, FL
This stunning estate Diamond wide diamond Bangle Bracelet was inpried with a Greek Key pattern
Category

Late 20th Century Classical Greek Bangles

Materials

Diamond, 18k Gold, Enamel

Tiffany Co. Diamond Yellow Gold Four-Leaf Clover Key Chain
By Tiffany Co.
Located in Southampton, PA
good luck, this adorable key chain designed by Tiffany & Co. offers exceptionally elegant and graceful
Category

Late 20th Century Unknown More Objets d Art and Vertu

Materials

White Diamond, 14k Gold, Yellow Gold

.40 Carat Diamond Yellow Gold Greek Key Design Unisex Ring
Located in Stamford, CT
Rectangular top signet style Greek key design diamond unisex, 18k yellow gold ring. 24 round
Category

21st Century and Contemporary Signet Rings

Materials

Diamond, Gold, 18k Gold, Yellow 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

  • 1
  • ...
Get Updated with New Arrivals
Save "Diamond Key", and we’ll notify you when there are new listings in this category.

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.