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.12 Carat Diamond Pearl Rose Gold Star Brooch Pendant
Located in Stamford, CT
Turn of the century, Antique cushion cut diamond natural pearl brooch pendant. 1 old mine cut
Category

Early 20th Century Brooches

Materials

Diamond, Pearl, Gold, 14k Gold, Rose Gold

GIA Certified .12 Carat Diamond Amethyst Pearl Art Nouveau Butterfly Brooch
Located in Stamford, CT
1910 Art Nouveau butterfly brooch. 18k yellow gold with silver tops set with 12 rose cut diamonds
Category

Early 20th Century Brooches

Materials

Amethyst, Diamond, Pearl, Gold, 18k Gold, Yellow Gold, Silver

12 Carat Diamond Broach in Platinum
Located in New York, NY
Gorgeous 12 carat diamond broach in platinum. The details are as follows : Diamond weight : 12
Category

2010s Brooches

Materials

Diamond, Platinum

David Webb Platinum & 18K Yellow Gold 12 Carat Diamond Crescent Brooch
By David Webb
Located in New York, NY
. This lovely brooch is set with round cut diamonds of approx. 12 carats. Brooch measures 2.25 inches.
Category

20th Century American Modern Brooches

Materials

Diamond, 18k Gold, Yellow Gold, Platinum

12 Carat Diamond Broach in Platinum
Located in New York, NY
Gorgeous 12 carat diamond broach in platinum. The details are as follows : Diamond weight : 12
Category

2010s Brooches

Materials

Diamond, Platinum

GIA Certified 12 Carat Gemstone Antique Brooch Playing Card Suit Poker
Located in Santa Barbara, CA
A lustrous and large club brooch pin, absolutely bursting with gems! Over 6.50 carats of old mine
Category

Vintage 1920s Art Deco Brooches

Materials

Chrysoberyl, White Diamond, Garnet, Sapphire, Gold, 14k Gold, Silver

Gianni Lazzaro Emerald 10, 12 Carat Diamond 18K White Gold Brooch for Her for Him
By Natkina
Located in Montreux, CH
Brooch White Gold 18 K Gianni Lazzaro Diamonds 129-.1,74ct.Gvs Diamond 2-0,40 ct Emerald 49
Category

21st Century and Contemporary Swiss Modern Brooches

Materials

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

Art Deco Platinum & Diamond Encrusted Pin/Fur Clips 12 CT / VS Quality Estate
Located in New York, NY
and unusual piece is made of 26 gm of platinum and encrusted with Approximately 12 carats of
Category

Vintage 1960s Brooches

Materials

Diamond, Platinum

Vintage 12 Carat NO HEAT GIA Sapphire and Diamond Gold Brooch Pendant Necklace
Located in Montreal, QC
approx. 12 Carats. GIA report #2235104643. Surrounded by RBC Diamonds, weighing approx. 2.85tcw
Category

21st Century and Contemporary Modern Pendant Necklaces

Materials

Diamond, Sapphire, Gold, 14k Gold, White Gold, Platinum

1930s 12 Carats Diamonds Platinum Flower Brooch
Located in Chestnut Hill, MA
the flower. The total weight of the diamonds is approximately 12 carats.
Category

20th Century Unknown Art Deco Brooches

Materials

Diamond, Platinum

Platinum and 12 Carats Diamonds French Art Deco Brooch
Located in Saint-Ouen, FR
A beautiful and spectacular brooch, made in France circa 1930. The diamonds are quality, for a
Category

Vintage 1920s French Art Deco Brooches

Materials

Diamond, Platinum

Spectacular 12 Carat Cabochon Emerald Diamond Gold Flower Brooch
Located in San Francisco, CA
emeralds. The 12 carat (approx) pear shape cabochon bud, while not of the highest gem quality, is a richly
Category

20th Century Brooches

Materials

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

12 Carat Invisible Set Ceylon Sapphire and Diamond Flower Brooch
Located in New York, NY
Stunning 12 Carat Invisible Set Ceylon Sapphire and Diamond Flower Brooch Stones: Ceylon
Category

20th Century Unknown Contemporary Brooches

Materials

Diamond, Sapphire, 18k Gold

Art Deco 12 Carats Diamonds Platinum Bow Pin
Located in Chestnut Hill, MA
Platinum Art Deco diamond bow pin consisting of approximately 12 carats of old European cut
Category

Antique Early 19th Century Brooches

Materials

Diamond, White Diamond

12 Carat Vintage Diamond Floral Platinum Brooch
Located in New York, NY
This is a lovely diamond vintage brooch crafted in 1960's set with over 12 carats of diamonds. It
Category

20th Century American Modern Brooches

Materials

Diamond, Platinum

1950s 12 Carats Diamonds Platinum Wave Brooch
Located in Scottsdale, AZ
1950's Platinum Diamond Baguettes and Rounds Brooch have 107 stones about 12tcw. Classic and very
Category

Vintage 1950s Brooches

Materials

White Diamond, Platinum

Victorian 12 Carat Ceylon No Heat Sapphire Diamond Gold Brooch
Located in Banbury, GB
This unique 18K gold sapphire diamond brooch from the Victorian era, is centered with an impressive
Category

Antique 1880s British Victorian Brooches

Materials

Diamond, Sapphire, 18k Gold

Vintage 18 Karat Yellow Gold Diamond and Ruby Spray Pin 0.63 Carat, 12 Grams
Located in Scottsdale, AZ
This vintage spray pin is designed in 18k yellow gold with a diamond pave set central curl “shaving
Category

21st Century and Contemporary American Contemporary Brooches

Materials

Diamond, Ruby, 18k Gold, Yellow Gold

Vivid Diamonds 12 Carat Diamond Cluster Brooch
Located in Miami, FL
shape, baguette, and marquise cut diamonds weighing approximately 12 carats total, F-G color, VS clarity
Category

Vintage 1980s Unknown Modern Pendant Necklaces

Materials

Diamond, Platinum

Seaman Schepps, 12 Carat Oval Cabochon Ruby, Gem-Set and Diamond Clip-Brooch
By Seaman Schepps
Located in New York, NY
. .95 ct., 3 round pink tourmalines, small single-cut diamonds, signed Seaman Schepps, c. 1940, ap. 13.6
Category

Vintage 1940s Brooches

Materials

Diamond, Ruby, Gold

12 Carat Diamond Sapphire Platinum Brooch Clip Set
Located in Lambertville, NJ
approx. 12 carats in VS-SI1/G diamonds. Brooch measures 65mm x 30mm, each clip, when worn separately
Category

Mid-20th Century American Brooches

Materials

Diamond, Sapphire, Platinum

1900s 12 Carat Aquamarine Pearl Diamond Gold Brooch
Located in Lake Forest, IL
This beautiful 12 carat Aquamarine, is surrounded by 20 Old European cut diamonds and the original
Category

Early 20th Century Brooches

Materials

Aquamarine, Diamond, Pearl, 18k Gold, Platinum

Tiffany & Co. 12 Carat Yellow Sapphires Diamonds Gold Dragonfly Brooch
By Tiffany & Co.
Located in Scottsdale, AZ
for a necklace features 12 Carats of Natural Yellow Sapphires and is accented by .50 carat of diamonds
Category

20th Century American Contemporary Brooches

Materials

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

Spectacular Black Opal and Diamond Brooch
Located in Houston, TX
30 carat Black opal and 12 carat Diamond Brooch custom made for Neiman Marcus
Category

21st Century and Contemporary Brooches

Materials

Opal, Diamond, Platinum

En Tremblant Diamond Platinum Flower Brooch Circa 1955
Located in Newport Beach, CA
Rare "En Tremblant" Platinum Diamond Flower Brooch, Circa 1955. 12 Carats of Marquise, Round and
Category

Vintage 1950s British Brooches

Materials

Diamond, Platinum

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Diamond Brooch 12 Carat For Sale on 1stDibs

On 1stDibs, you can find the most appropriate diamond brooch 12 carat for your needs in our varied inventory. Frequently made of Gold, Platinum and 18k Gold, this item was constructed with great care. In our selection of items, you can find a vintage example as well as a contemporary version. Making the right choice when shopping for a diamond brooch 12 carat may mean carefully reviewing examples of this item dating from different eras — you can find an early iteration of this piece from the 20th Century and a newer version made as recently as the 21st Century, both of which have proven very popular over the years. Finding an appealing diamond brooch 12 carat — no matter the origin — is easy, but David Webb, Natkina and Sophia D each produced a popular version that is worth a look. See these pages for a round cut iteration of this accessory, while there are also baguette cut cut and emerald cut cut versions available here, too. Most of our diamond brooch 12 carat for sale are for women, but there are 4 pieces available to browse for men.

How Much is a Diamond Brooch 12 Carat?

The price for a diamond brooch 12 carat starts at $800 and tops out at $45,583 with these brooches, on average, selling for $11,960.

Why Gold Shines in Jewelry Craftsmanship

Gold is the feel-good metal, the serotonin of jewelry. Wear vintage and antique gold necklaces, watches, gold bracelets or gold rings and you feel happy, you feel dressed, you feel, well, yourself. 

Gold, especially yellow gold, with its rich patina and ancient pedigree going back thousands of years, is the steady standby, the well-mannered metal of choice. Any discussion of this lustrous metal comes down to a basic truth: Gold is elementary, my dear. Gold jewelry that couples the mystique of the metal with superb design and craftsmanship achieves the status of an enduring classic. Many luxury houses have given us some of our most treasured and lasting examples of gold jewelry over the years.

Since its founding, in 1837, Tiffany & Co. has built its reputation on its company jewelry as well as its coterie of boutique designers, which has included Jean Schlumberger, Donald Claflin, Angela Cummings and Elsa Peretti. There are numerous gold Tiffany classics worth citing. Some are accented with gemstones, but all stand out for their design and the workmanship displayed.

For the woman who prefers a minimalist look, the Tiffany & Co. twist bangle (thin, slightly ovoid) is stylishly simple. For Cummings devotees, signature pieces feature hard stone inlay, such as her pairs of gold ear clips inlaid with black jade (a play on the classic Chanel black and tan), or bangles whose design recalls ocean waves, with undulating lines of lapis lazuli and mother-of-pearl. And just about any design by the great Jean Schlumberger is by definition a classic.

Even had he eschewed stones and diamonds, Southern-born David Webb would be hailed for the vast arsenal of heavy gold jewelry he designed. Gold, usually hammered or textured in some manner, defines great David Webb jewelry. The self-taught jeweler made very au courant pieces while drawing inspiration from ancient and out-of-the-way sources — East meets West in the commanding gold necklaces made by Webb in the early 1970s. The same could be said for his endlessly varied gold cuffs.

In Europe, many houses have given us gold jewelry that sets the highest standard for excellence, pieces that were highly sought after when they were made and continue to be so. 

Numerous designs from Cartier are homages to gold. There are the classic Trinity rings, necklaces and bracelets — trifectas of yellow, white and rose gold. As a testament to the power of love, consider the endurance of the Cartier Love bracelet.

Aldo Cipullo, Cartier’s top in-house designer from the late 1960s into the early ’70s, made history in 1969 with the Love bracelet. Cipullo frequently said that the Love bracelet was born of a sleepless night contemplating a love affair gone wrong and his realization that “the only remnants he possessed of the romance were memories.” He distilled the urge to keep a loved one close into a slim 18-karat gold bangle. 

BVLGARI and its coin jewelry, gemme nummarie, hit the jackpot when the line launched in the 1960s. The line has been perennially popular. BVLGARI coin jewelry features ancient Greek and Roman coins embedded in striking gold mounts, usually hung on thick link necklaces of varying lengths. In the 1970s, BVLGARI introduced the Tubogas line, most often made in yellow gold. The Tubogas watches are classics, and then there is the Serpenti, the house's outstanding snake-themed watches and bracelets.

A collection called Monete that incorporated the gold coins is one of several iconic BVLGARI lines that debuted in the 1970s and ’80s, catering to a new generation of empowered women. Just as designers like Halston and Yves Saint Laurent were popularizing fuss-free ready-to-wear fashion for women on the go, BVLGARI offered jewels to be lived in

Since Van Cleef & Arpels opened its Place Vendôme doors in 1906, collection after collection of jewelry classics have enchanted the public. As predominantly expressed in a honeycomb of gold, there is the Ludo watch and accessories, circa the 1920s, and the golden Zip necklace, 1951, whose ingenious transformation of the traditional zipper was originally proposed by the Duchess of Windsor. Van Cleef's Alhambra, with its Moroccan motif, was introduced in 1968 and from the start its popularity pivoted on royalty and celebrity status. It remains one of VCA’s most popular and collected styles.

Mention must be made of Buccellati, whose name is synonymous with gold so finely spun that it suggests tapestry. The house’s many gold bracelets, typically embellished with a few or many diamonds, signified taste and distinction and are always in favor on the secondary market. Other important mid-20th-century houses known for their gold-themed jewelry include Hermès and Ilias Lalaounis.

Find a stunning collection of vintage and antique gold jewelry on 1stDibs.

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.  

Finding the Right Brooches for You

Vintage brooches, which refer to decorative jewelry traditionally pinned to garments and used to fasten pieces of clothing together where needed, have seen increasing popularity in recent years.

While jewelry trends come and go, brooches are indeed back on the radar thanks to fashion houses like GucciVersaceDior and Saint Laurent, all of which feature fun pinnable designs in their current collections. Whether a dazzlingly naturalistic Art Nouveau dragonfly, a whimsical David Webb animal, a gem-studded bloom or a streamlined abstract design, these jewels add color and sparkle to your look and a spring to your step. 

Given their long history, brooches have expectedly taken on a variety of different shapes and forms over time, with jewelers turning to assorted methods of ornamentation for these accessories, including enameling and the integration of pearls and gemstones. Cameo brooches that originated during the Victorian age are characterized by a shell carved in raised relief that feature portraits of a woman’s profile, while 19th-century micromosaic brooches, comprising innumerable individually placed glass fragments, sometimes feature miniature depictions of a pastoral scene in daily Roman life.

At one time, brooches were symbols of wealth, made primarily from the finest metals and showcasing exquisite precious gemstones. Today, these jewels are inclusive and universal, and you don’t have to travel very far to find an admirer of brooches. They can be richly geometric in form, such as the ornate diamond pins dating from the Art Deco era, or designer-specific, such as the celebrated naturalistic works created by Tiffany & Co., the milk glass and gold confections crafted by Trifari or handmade vintage Chanel brooches of silk or laminated sheer fabric. Chanel, of course, has never abandoned this style, producing gorgeously baroque CC examples since the 1980s.

Brooches are versatile and adaptable. These decorative accessories can be worn in your hair, on hats, scarves and on the lower point of V-neck clothing. Pin a dazzling brooch to the lapel of your blazer-and-tee combo or add a cluster of smaller pins to your overcoat. And while brooches have their place in “mourning jewelry,” in that a mourning brooch is representative of your connection to a lost loved one, they’re widely seen as romantic and symbolic of love, so much so that a hardcore brooch enthusiast might advocate for brooches to be worn over the heart.

Today, find a wide variety of antique and vintage brooches for sale on 1stDibs, including gold brooches, sapphire brooches and more.

Questions About Diamond Brooch 12 Carat
  • 1stDibs ExpertFebruary 22, 2021
    The size of a 12 carat diamond is dependent on diamond cut. A 12 carat round diamond is roughly 15 mm in size.