100 Carat Diamond

Irid Platinum

Diana M Diamond Studs

Michelle Obama

18k Asian Gold Necklace

Natural Fancy Yellow Diamond Necklace

18k Diamond Heart Necklace

Charlize Theron

Old Cut Fancy Yellow Diamond

100 Carat Diamond Riviera Platinum Necklace

$1,400,000Sale Price|20% Off

$228,000

100 Carat Platinum Diamond Drop Necklace

By Diana M. Jewels

Located in New York, NY

Pear Shaped Diamond Drop Necklace in Platinum Platinum Drop Diamond Statement Necklace features 100.00 Carats of pear, marquise and round diamonds, the diamonds are fine quality. ...

Category

21st Century and Contemporary American Drop Necklaces

Materials

Diamond, Platinum

4.00 Carat Diamond Necklace G SI 14K White Gold 100% Natural Diamonds

$6,133 / item

4.00 Carat Diamond Necklace G SI 14K White Gold 100% Natural Diamonds

By Morris & David

Located in New York, NY

4.00 Carat Diamond Necklace G SI 14K White Gold 16 inches 100% Natural Diamonds, Not Enhanced in any way Round Cut Necklace 4.00CT G-H SI 14K White Gold, Prong style, 15.5 gram...

Category

21st Century and Contemporary American Modern Choker Necklaces

Materials

Diamond, White Gold

$1,799 / item

4.20 Carat Diamond Cluster Earring Crawlers 18k Rose Gold

Located in Miami, FL

Material: 18K Rose Gold Diamonds: Round Cut, Cluster Style *These are 100% Naturally Earth Mined Diamonds.

Category

21st Century and Contemporary American Hoop Earrings

Materials

Diamond, 18k Gold, Rose Gold

Diana M. 15.00 Carat Diamond Hoops in 18kt Yellow Gold

$25,200

$2,700Sale Price|20% Off

$19,750

Yellow Gold and Diamond Serpent Bracelet

By Vaid

Located in Bethesda, MD

Elegant diamond serpent bracelet crafted in 18kt gold, featuring 100 sparkling diamonds totaling 1.70 carats.

Category

Early 2000s Bangles

Materials

Diamond, Yellow Gold

Alexander Beverly Hills 24.55ct Diamond Tennis Necklace 18k Yellow Gold 16.5in

$53,000Sale Price|20% Off

Alexander Beverly Hills 24.55ct Diamond Tennis Necklace 18k Yellow Gold 16.5in

By Alexander Beverly Hills

Located in BEVERLY HILLS, CA

Beautiful and classic natural diamond tennis necklace, by Alexander Beverly Hills. 100 round brilliant diamonds, 24.55 carats.

Category

21st Century and Contemporary American Contemporary Pendant Necklaces

Materials

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

Brand New Sapphire Diamond Pendant Mined Diamond Square Halo .77ct 14K Gold

$500

Brand New Sapphire Diamond Pendant Mined Diamond Square Halo .77ct 14K Gold

Located in Dearborn, MI

Brand New Sapphire Diamond Pendant Mined Diamond Square Halo .77ct 14K Featuring a Genuine .61ct Natural Round Brilliant Cut Sapphire Center Gorgeous Round Brilliant Sapphire En...

Category

2010s Pendant Necklaces

Materials

Diamond, Sapphire, 14k Gold, White Gold

14K White Gold Diamond Earrings

$350

$2,860

14K White Gold Diamond Earrings

By Diana M. Jewels

Located in New York, NY

All purchases come with a jewelry box. . 14K White Gold Diamond Earrings featuring 3.00 Carat T.W. of Natural Diamonds • Crafted in White Gold • 3.00 Carat White Diamonds • 100%...

Category

21st Century and Contemporary American Hoop Earrings

Materials

Materials

Diamond, 18k Gold

Artisan, 100 Carat Diamond Cognac Vine-Floral, Cuff Bracelet

Unavailable

Unavailable

Yianni Creations 1.10 Carat Aquamarine Diamond Fine Silver 100% Handmade Ring

By Yianni Creations

Located in Astoria, NY

Yianni Creations 100% Handmade Ring from Fine Silver featuring 1.10 Carat Aquamarine accompanied by 0.03 Carat Diamond complemented by unique techniques of craftsmanship - brushed te...

Category

2010s Greek Contemporary Fashion Rings

Materials

Aquamarine, Diamond, White Diamond, Silver, Palladium

Alfred Hammel 18 Carat Solid Gold Diamond Watch, NO 029/100

Unavailable

Alfred Hammel 18 Carat Solid Gold Diamond Watch, NO 029/100

Located in Splitter's Creek, NSW

The Integral Bracelet band has 14 round brilliant cut Diamonds, just over quarter carat in weight, colour G/H, clarity SI!

Category

21st Century and Contemporary Swiss Modern Wrist Watches

Materials

Diamond, Gold, 18k Gold

2.39 Carat 100% Natural Afghan Emerald Oval Cut and Diamonds Ring in White Gold

Unavailable

Unavailable

Unavailable

Unavailable

L 1.38 in

10.57 Carat Blue Topaz Diamond 18 Karat White Gold Dangle Drop Earrings

By Butani

Located in Hong Kong, Kowloon

Composition: 18K White Gold 2 Square Blue Topaz: 10.57 carats 100 Round Diamonds: 1.55 carats Diamond Quality: VS, G/H About Butani: Family-run high jewellery house Butani comb...

Category

Early 2000s Hong Kong Contemporary Dangle Earrings

Materials

Diamond, White Diamond, Topaz, Blue Topaz, 18k Gold, White Gold

1.50 Carat Emerald Diamond Necklace 18 Karat Rose Gold

Unavailable

1.50 Carat Emerald Diamond Necklace 18 Karat Rose Gold

Located in Barnsley, GB

The Incas had already been using emeralds in their jewellery and religious ceremonies for 500 years We can custom any items too Emerald 1.50ct Diamonds: 100% Natural Diamonds Car...

Category

21st Century and Contemporary Contemporary Pendant Necklaces

Materials

Diamond, Emerald, 18k Gold, Rose Gold

Thick Diamond Tennis Bracelet Gold Rose with Natural Diamonds 3 Carats VVS DE

Unavailable

Unavailable

05.00 Carat Round Cut Diamond Riviera Necklace in 14K White Gold

Located in Chicago, IL

This piece comes directly from the vault of Atlantic Diamond Company—a family-run fine jewelry house with nearly 50 years of history serving elite collectors, retailers, and dealers ...

Category

2010s Contemporary Chain Necklaces

Materials

Diamond, White Diamond, 14k Gold, White Gold

W 1.5 in L 16 in

7.55 Carat Natural Diamond Necklace by Designer 14 Karat White Gold G SI

By Morris & David

Located in New York, NY

7.55 Carat Natural Diamond Necklace by Designer 14K White Gold G SI 16 inches 100% Natural Diamonds, Not Enhanced in any way Round Cut Diamond Necklace 7.55CT G-H ...

Category

21st Century and Contemporary American Contemporary Drop Necklaces

Materials

Diamond, 14k Gold, White Gold

Emerald and Diamond Necklace

$281,750

Emerald and Diamond Necklace

By Diamond Scene New York

Located in New York, NY

A timeless design! 61.85 carats of Fine certified VIVID GREEN Oval Emeralds 37.91 carats of white round brilliant, pear and marquise cut diamonds. Set in platinum. 17.5 inch ...

Category

21st Century and Contemporary Choker Necklaces

Materials

Diamond, Emerald, Platinum

Diamond Aquamarine 18 Karat White Gold Pendant Necklace

$2,195

L 17.72 in

Diamond Aquamarine 18 Karat White Gold Pendant Necklace

By SCALA GIOIELLI

Located in Marcianise, IT

Elegance and refinement in a single jewel – this stunning 18-karat white gold pendant is a true masterpiece of fine jewelry, designed for those who seek a unique, sophisticated acces...

Category

21st Century and Contemporary Italian Artisan Pendant Necklaces

Materials

Aquamarine, Diamond, 18k Gold, White Gold

IGI Certified 29.42ct Natural Emeralds 1.77ct Natural Diamonds Gold Necklace

$18,200Sale Price|33% Off

L 16.15 in

IGI Certified 29.42ct Natural Emeralds 1.77ct Natural Diamonds Gold Necklace

Located in Hong Kong, HK

Experience pure elegance with this exquisite 41cm necklace by Top Crown Jewelry, featuring a stunning collection of IGI certified natural Zambian emeralds totaling 29.42 carats in me...

Category

21st Century and Contemporary Hong Kong Modern Link Necklaces

Materials

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

3.76 Carat Diamond Necklace Statement Jewelry 18K White Gold

$15,000

L 17 in

By Chanel

Located in Nice, FR

CHANEL vintage rare tassel belt featuring alternating gold toned chain sections and large faux pearls. Triple swag at front. Collection 23 - Year : 1988. Adjustable size. Hook clos...

Category

20th Century French Belts

UNWORN Black Versace 2003 Bodycon Corset Zip Evening Cocktail Dress 40

$1,799

Size: 40

UNWORN Black Versace 2003 Bodycon Corset Zip Evening Cocktail Dress 40

By Versace

Located in Switzerland, CH

Gorgeous black VERSACE bodycon corset top dress From the famous FW 2003 collection Flattering skirt part The top is as a corset tight on the body Zip details with silver hardware, d...

Category

Early 2000s Italian Cocktail Dresses

Van Cleef and Arpels 5 motif bracelet in guilloche gold and diamonds

$16,904

Van Cleef and Arpels 5 motif bracelet in guilloche gold and diamonds

By Van Cleef & Arpels

Located in London, England

Van Cleef & Arpels Vintage Alhambra bracelet 5 motifs in 18K yellow gold and Diamonds. This VCA bracelet in guilloché 18K yellow gold and diamonds. Comes with makers box and a recen...

Category

2010s Modern Charm Bracelets

Materials

Diamond, 18k Gold

UNWORN Missoni Rainbow Metallic Crochet Knit Pants Crop Top Ensemble Set 42

$799Sale Price|55% Off

Size: 42 fits best approximately US 6

UNWORN Missoni Rainbow Metallic Crochet Knit Pants Crop Top Ensemble Set 42

By Missoni

Located in Switzerland, CH

BEAUTIFUL MISSONI ORANGE LABEL KNIT 2PCS ENSEMBLE Stunning Missoni set in rainbow colors Classic MISSONI signature crochet knit Consisting of two pieces, pants and top Simply slips...

Category

2010s Italian Trouser Pant Suits

1970s Victoria Royal Kelly Green + White Abstract Floral Sequined Chiffon Gown

$1,585

Size: Medium

1970s Victoria Royal Kelly Green + White Abstract Floral Sequined Chiffon Gown

By Victoria Royal

Located in San Diego, CA

Beautiful early 1970s VICTORIA ROYAL kelly green and white abstract floral sequined gown / maxi dress! Printed throughout the dress, sleeves, trim and cuffs. Hundreds of hand-sewn li...

Category

1970s Hong Kong Evening Gowns

CHANEL gold-tone metal 90P PEARL TASSEL CHAIN Belt OZ

$4,500

CHANEL gold-tone metal 90P PEARL TASSEL CHAIN Belt OZ

By Chanel

Located in Zürich, CH

Tjos 100% authentic Chanel chain belt is crafted in gold-tone curb links and draped with two strands of pearly white imitation pearls for a signature layered effect. A pearl-strung c...

Category

1990s Belts

Azzedine Alaia Patterned Wool Jacket

$395

L 21.5 in

Azzedine Alaia Patterned Wool Jacket

By Azzedine Alaïa

Located in New Hope, PA

A cheerful combination of red, yellow, blue and beige is used for the circles and squares in the pattern of this woven wool jacket. It closes with hooks and eyes and the interior sea...

Category

20th Century French Jackets

New Yves Saint Laurent Spring 2008 Size 40 / US 8 Black Silk Strapless Dress

$1,875

Size: 40 / US 8

New Yves Saint Laurent Spring 2008 Size 40 / US 8 Black Silk Strapless Dress

By Stefano Pilati for Yves Saint Laurent, Yves Saint Laurent

Located in San Diego, CA

Chic brand new with tags YVES SAINT LAURENT Spring 2008 black silk strapless dress! Features intricate interior corset boning that holds everything in place. Hidden zipper up the sid...

Category

Early 2000s French Cocktail Dresses

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100 Carat Diamond For Sale on 1stDibs

Find the exact 100 carat diamond you’re shopping for in the variety available on 1stDibs. Every item for sale was constructed with extraordinary care, often using Gold, White Gold and 14k Gold. You can easily find a 21 antique edition and 40 modern creations to choose from as well. You’re likely to find the perfect 100 carat diamond among the distinctive items we have available, which includes versions made as long ago as the 19th Century as well as those produced as recently as the 21st Century. For this particular piece, .5 Carat and 1 Carat are consistently popular carat weights. A 100 carat diamond from Antinori Fine Jewels, Michael Kanners and H. Stern — each of whom created a beautiful version of this treasured accessory — is worth considering. See these pages for a round cut iteration of this accessory, while there are also oval cut cut and cushion cut cut versions available here, too. If you’re browsing our inventory for a 100 carat diamond, you’ll find that many are available today for women, but there are still pieces to choose from for unisex and men.

How Much is a 100 Carat Diamond?

Prices for a 100 carat diamond can differ depending upon size, time period and other attributes — at 1stDibs, these accessories begin at $349 and can go as high as $1,300,000, while this accessory, on average, fetches $27,456.

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 rings, vintage engagement rings or Art Deco engagement rings.

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