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Square Diamond Platinum Brooch

Platinum and Emerald Diamond Brooch
Platinum and Emerald Diamond Brooch

Platinum and Emerald Diamond Brooch

Located in New York, NY

Platinum and Emerald Diamond Brooch. Details: Platinum, emerald, diamonds, about approx. 4.5

Category

Vintage 1970s Brooches

Materials

Diamond, Emerald, Platinum

Leaf Brooch with Square-Cut Emerald and White Diamonds
Leaf Brooch with Square-Cut Emerald and White Diamonds

Leaf Brooch with Square-Cut Emerald and White Diamonds

Located in Scottsdale, AZ

This brooch features a leaf design adorned with a single square-cut green emerald and multiple

Category

21st Century and Contemporary Brooches

Materials

Diamond, Emerald, Platinum

Edwardian Peridot and Diamond Platinum Brooch
Edwardian Peridot and Diamond Platinum Brooch

Edwardian Peridot and Diamond Platinum Brooch

Located in Banbury, GB

An Edwardian peridot and diamond brooch, of quatrefoil design, centered with a square-shaped

Category

Antique Early 1900s British Edwardian Brooches

Materials

Diamond, Peridot, Platinum

Platinum Sapphire and Diamond Filigree Brooch/Pin #21768
Platinum Sapphire and Diamond Filigree Brooch/Pin #21768

Platinum Sapphire and Diamond Filigree Brooch/Pin #21768

Located in Washington Depot, CT

Platinum Sapphire and Diamond Filigree Brooch/Pin JAGi Certified- This stunning brooch features 5

Category

20th Century Contemporary Brooches

Materials

Diamond, Sapphire, Platinum

Art Deco Platinum Diamond & Sapphire Open Square Cut Corner Ribbon Top Brooch
Art Deco Platinum Diamond & Sapphire Open Square Cut Corner Ribbon Top Brooch

Art Deco Platinum Diamond & Sapphire Open Square Cut Corner Ribbon Top Brooch

Located in Montclair, NJ

-- Stone(s) -- (77) Natural Genuine Diamonds - Old Mine & Single Cut - Pave Set - Nice

Category

Antique 19th Century Art Deco Brooches

Materials

Diamond, Sapphire, White Gold, Platinum

Adorable Oscar Heyman Carved Ruby Diamond Platinum Bird Brooch
Adorable Oscar Heyman Carved Ruby Diamond Platinum Bird Brooch

Adorable Oscar Heyman Carved Ruby Diamond Platinum Bird Brooch

By Oscar Heyman

Located in New York, NY

Adorable platinum bird brooch by Oscar Heyman, set with carved ruby, enamel accents and approx

Category

20th Century North American Brooches

Materials

Diamond, Onyx, Ruby, Platinum

Antique 0.24Ct Sapphire and 0.12Ct Diamond Platinum Pin Brooch Circa 1930
Antique 0.24Ct Sapphire and 0.12Ct Diamond Platinum Pin Brooch Circa 1930

Antique 0.24Ct Sapphire and 0.12Ct Diamond Platinum Pin Brooch Circa 1930

Located in Jesmond, Newcastle Upon Tyne

A fine and impressive antique 1930s 0.24 carat sapphire and 0.12 carat diamond, platinum pin brooch

Category

Vintage 1930s Brooches

Materials

Diamond, Sapphire, White Gold, Platinum

Antique Edwardian Platinum Peridot and Pearl Swag Brooch
Antique Edwardian Platinum Peridot and Pearl Swag Brooch

Antique Edwardian Platinum Peridot and Pearl Swag Brooch

Located in New York, NY

A graceful Edwardian brooch designed in the refined swag style, delicately composed of platinum. At

Category

Early 20th Century Edwardian Brooches

Materials

Diamond, Pearl, Peridot, Platinum, Brass

Antique Edwardian 1910s 5.00 Carat Diamond Brooch with Onyx
Antique Edwardian 1910s 5.00 Carat Diamond Brooch with Onyx

Antique Edwardian 1910s 5.00 Carat Diamond Brooch with Onyx

Located in New York, NY

Finely crafted in platinum with a Modified Square cut Diamond at the center weighing approximately

Category

Vintage 1910s Edwardian Brooches

Materials

Diamond, Onyx, Platinum

1910s Antique Pearl Ruby and Diamond Yellow Gold Brooch
1910s Antique Pearl Ruby and Diamond Yellow Gold Brooch

1910s Antique Pearl Ruby and Diamond Yellow Gold Brooch

Located in Jesmond, Newcastle Upon Tyne

An impressive pearl and 0.55 carat ruby, 0.30 carat diamond and 12 karat yellow gold brooch; part

Category

Vintage 1910s Unknown Art Deco Brooches

Materials

Diamond, Pearl, Ruby, Yellow Gold, Platinum

Columbian Emerald, Diamond and Onyx Art Deco Brooch, ca. 1920s
Columbian Emerald, Diamond and Onyx Art Deco Brooch, ca. 1920s

Columbian Emerald, Diamond and Onyx Art Deco Brooch, ca. 1920s

Located in Idar-Oberstein, DE

An emerald, diamond and onyx Art Deco brooch, ca. 1920, in platinum. The facetted square emerald

Category

Vintage 1920s Swedish Art Deco Brooches

Materials

Diamond, Emerald, Onyx, Platinum

Boucheron Retro Gold, Sapphire, and Diamond Scroll Design Clip Brooches
Boucheron Retro Gold, Sapphire, and Diamond Scroll Design Clip Brooches

Boucheron Retro Gold, Sapphire, and Diamond Scroll Design Clip Brooches

By Boucheron

Located in New York, NY

A pair of Retro scroll design gold clip brooches set with square-cut sapphires and round diamonds

Category

Vintage 1940s French Retro Brooches

Materials

Diamond, Sapphire, Gold, 18k Gold, Platinum

Plat 1" American Flag Brooch, .85Ct. Diamond, 1.75 Carat Ruby & 1.88Ct. Sapphire
Plat 1" American Flag Brooch, .85Ct. Diamond, 1.75 Carat Ruby & 1.88Ct. Sapphire

Plat 1" American Flag Brooch, .85Ct. Diamond, 1.75 Carat Ruby & 1.88Ct. Sapphire

By Cellini

Located in New York, NY

The perfect brooch for 2020. Our American flag brooch set with round brilliant diamonds and square

Category

Early 2000s Contemporary Brooches

Materials

Diamond, Ruby, Blue Sapphire, Platinum

Retro Gübelin Gold, Diamond, and Sapphire Clip Brooch of Stylized Bow Design
Retro Gübelin Gold, Diamond, and Sapphire Clip Brooch of Stylized Bow Design

Retro Gübelin Gold, Diamond, and Sapphire Clip Brooch of Stylized Bow Design

By Gubelin

Located in New York, NY

A Retro gold, sapphire, and diamond brooch designed as a stylized asymmetrical bow with a scrolled

Category

Vintage 1940s Swiss Retro Brooches

Materials

Diamond, Sapphire, Gold, Platinum

Oscar Heyman Platinum Union Jack Diamond, Sapphire, and Ruby Lapel Pin
Oscar Heyman Platinum Union Jack Diamond, Sapphire, and Ruby Lapel Pin

Oscar Heyman Platinum Union Jack Diamond, Sapphire, and Ruby Lapel Pin

By Oscar Heyman

Located in New York City, NY

Oscar Heyman platinum Union Jack flag lapel pin contains custom cut rubies (0.76cts), sapphires

Category

2010s American Contemporary Brooches

Materials

Diamond, Ruby, Sapphire, Platinum

Antique Art Deco Platinum Yogo Gulch Sapphire Old Euro Diamond Bar Pin - GIA
Antique Art Deco Platinum Yogo Gulch Sapphire Old Euro Diamond Bar Pin - GIA

Antique Art Deco Platinum Yogo Gulch Sapphire Old Euro Diamond Bar Pin - GIA

Located in Great Neck, NY

Beautiful Antique Art Deco Platinum Yogo Gulch Sapphire Old Euro Diamond Bar Pin - GIA. This

Category

Vintage 1920s Art Deco Brooches

Materials

Diamond, Sapphire, Platinum

Antique 18 Karat Yellow Gold & Platinum Bar Pin with Ruby & Diamond
Antique 18 Karat Yellow Gold & Platinum Bar Pin with Ruby & Diamond

Antique 18 Karat Yellow Gold & Platinum Bar Pin with Ruby & Diamond

Located in Vero Beach, FL

” wide. Pin has 8 (eight) Old Mine Cut Diamonds weighing approx. 0.16 carat total. 8 (eight) Square cut

Category

Antique Late 19th Century European High Victorian Brooches

Materials

Diamond, Ruby, 18k Gold, Yellow Gold, Platinum

Retro Ruby Sapphire Diamond Emerald Enamel 18k Yellow Gold & Platinum Bird Brooc
Retro Ruby Sapphire Diamond Emerald Enamel 18k Yellow Gold & Platinum Bird Brooc

Retro Ruby Sapphire Diamond Emerald Enamel 18k Yellow Gold & Platinum Bird Brooc

Located in Beverly Hills, CA

sapphire along with white diamonds adding brilliant contrast. The use of enamel and platinum adds depth and

Category

Vintage 1930s American Retro Brooches

Materials

Diamond, Emerald, Ruby, Sapphire, 18k Gold, Yellow Gold, Platinum, Enamel

Vintage Retro 14k Gold & Platinum GIA Burma No Heat Ruby Diamond Ribbon Bar Pin
Vintage Retro 14k Gold & Platinum GIA Burma No Heat Ruby Diamond Ribbon Bar Pin

Vintage Retro 14k Gold & Platinum GIA Burma No Heat Ruby Diamond Ribbon Bar Pin

Located in Montclair, NJ

platinum, and is dated 1938. It features a set of 7 natural genuine square step cut rubies that have been

Category

Vintage 1940s Retro Brooches

Materials

Diamond, Ruby, 14k Gold, Rose Gold, Platinum

Circa 1920s Art Deco 18K Yellow Gold & Platinum Sapphire and Diamond Bar Pin
Circa 1920s Art Deco 18K Yellow Gold & Platinum Sapphire and Diamond Bar Pin

Circa 1920s Art Deco 18K Yellow Gold & Platinum Sapphire and Diamond Bar Pin

Located in Hicksville, NY

Year: 1920s Item Details: Metal Type: 18K Yellow Gold & Platinum Top [Hallmarked, and Tested

Category

Vintage 1920s Unknown Art Deco Brooches

Materials

Diamond, Sapphire, 18k Gold, Yellow Gold

Tiffany & Co. Art Deco Sapphire and Diamond Bar Pin
Tiffany & Co. Art Deco Sapphire and Diamond Bar Pin

Tiffany & Co. Art Deco Sapphire and Diamond Bar Pin

By Tiffany & Co.

Located in Bethesda, MD

This Tiffany & Co. Art Deco platinum pin sounds exquisite! Featuring 10 diamonds with a total of

Category

Vintage 1930s American Art Deco Brooches

Materials

Diamond, Sapphire, Platinum

Antique Kunzite & Diamond Necklace/Brooch circa 1910
Antique Kunzite & Diamond Necklace/Brooch circa 1910

Antique Kunzite & Diamond Necklace/Brooch circa 1910

$48,254

H 0.87 in W 0.87 in L 9.06 in

Antique Kunzite & Diamond Necklace/Brooch circa 1910

Located in London, GB

Summary: Antique Kunzite & Diamond Necklace/Brooch Description: An Edwardian kunzite and diamond

Category

Early 20th Century British Pendant Necklaces

Materials

White Diamond, Kunzite, Platinum

Recent Sales

7.00 Carat Old Miner, French Cut & Square Emerald Art Deco Platinum Pin
7.00 Carat Old Miner, French Cut & Square Emerald Art Deco Platinum Pin

7.00 Carat Old Miner, French Cut & Square Emerald Art Deco Platinum Pin

Located in New York, NY

Classic Art Deco brooch combining the breadth of Old Miner, French Cut, Square Cut, and Emerald Cut

Category

Early 20th Century American Art Deco Brooches

Materials

White Diamond, Emerald, Platinum

Platinum Diamond and Sapphire Brooch
Platinum Diamond and Sapphire Brooch

Platinum Diamond and Sapphire Brooch

Located in Princeton, NJ

Vintage Platinum Sapphire & Diamond brooch. The oval shaped brooch has an outer row of diamonds and

Category

Vintage 1920s Unknown Art Deco Brooches

Materials

Diamond, Sapphire, Platinum

Square-Shaped Diamond Brooch with Oynx
Square-Shaped Diamond Brooch with Oynx

Square-Shaped Diamond Brooch with Oynx

Located in New York, NY

23x24.5mm. It is adorned with a cute round-cut diamond bowtie and ribbon on the square frame brooch, further

Category

Vintage 1920s Unknown Art Deco Brooches

Materials

Diamond, Onyx, Platinum

2.45 Carat Sapphire and 1.75 Carat Diamond Platinum Brooch
2.45 Carat Sapphire and 1.75 Carat Diamond Platinum Brooch

2.45 Carat Sapphire and 1.75 Carat Diamond Platinum Brooch

Located in Jesmond, Newcastle Upon Tyne

A stunning, fine and impressive vintage 2.45 carat blue sapphire and 1.75 carat diamond, platinum

Category

Vintage 1940s Brooches

Materials

Diamond, Sapphire, Platinum

6 Carat Ruby and 1.31 Carat Diamond Platinum Bow Brooch
6 Carat Ruby and 1.31 Carat Diamond Platinum Bow Brooch

6 Carat Ruby and 1.31 Carat Diamond Platinum Bow Brooch

Located in Jesmond, Newcastle Upon Tyne

A stunning antique 6 carat Burmese ruby and 1.31 carat diamond, platinum bow brooch; part of our

Category

Vintage 1920s Unknown Brooches

Materials

Diamond, Ruby, Platinum

Platinum Diamond Sapphire Brooch Womens Vintage Art Deco Royalcore Estate
Platinum Diamond Sapphire Brooch Womens Vintage Art Deco Royalcore Estate

Platinum Diamond Sapphire Brooch Womens Vintage Art Deco Royalcore Estate

Located in New York, NY

Sapphire and Diamond Brooch Metal Type: Platinum 950 Total Item Weight: 11.4 Grams 1: Primary

Category

Mid-20th Century Art Deco Brooches

Materials

Diamond, Sapphire, Platinum

Belle Epoque Platinum & Gold Aquamarine Ruby Diamond and Pearl Pin Brooch
Belle Epoque Platinum & Gold Aquamarine Ruby Diamond and Pearl Pin Brooch

Belle Epoque Platinum & Gold Aquamarine Ruby Diamond and Pearl Pin Brooch

Located in Montclair, NJ

- Vivid Red Color Numerous Natural Genuine Diamonds - Rose Cut - Pave Set on Platinum - Nice White Color

Category

Antique 19th Century Belle Époque Brooches

Materials

Aquamarine, Diamond, Pearl, Ruby, Gold, Platinum

Antique Edwardian 18k Gold Platinum Diamond Ruby Swallow Flying Bird Pin Brooch
Antique Edwardian 18k Gold Platinum Diamond Ruby Swallow Flying Bird Pin Brooch

Antique Edwardian 18k Gold Platinum Diamond Ruby Swallow Flying Bird Pin Brooch

Located in Montclair, NJ

Genuine Diamonds - Rose Cut - Pave Set - White Color Material: Solid 18k Yellow Gold w/ Platinum Accents

Category

Early 20th Century Edwardian Brooches

Materials

Diamond, Ruby, Gold, 18k Gold, Yellow Gold, Platinum

Art Deco 0.75ct Diamond Brooch, c.1920s
Art Deco 0.75ct Diamond Brooch, c.1920s

Art Deco 0.75ct Diamond Brooch, c.1920s

Located in London, GB

This stunning brooch dates back to the roaring 20s. The bold geometric shapes crafted from platinum

Category

Vintage 1920s Unknown Art Deco Brooches

Materials

Diamond, Platinum

Vintage Ruby and Diamond Horseshoe Brooch
Vintage Ruby and Diamond Horseshoe Brooch

Vintage Ruby and Diamond Horseshoe Brooch

Located in London, GB

Here we have a striking brooch crafted from 18ct yellow gold and platinum in a refined horseshoe

Category

Vintage 1930s Brooches

Materials

Diamond, Ruby, Gold, 18k Gold, Yellow Gold, Platinum

Antique 1930s Emerald Diamond Gold Brooch
Antique 1930s Emerald Diamond Gold Brooch

Antique 1930s Emerald Diamond Gold Brooch

Sold

H 0.15 in W 0.9 in L 2.04 in

Antique 1930s Emerald Diamond Gold Brooch

Located in Jesmond, Newcastle Upon Tyne

Analyzer) and verified as 9k gold and platinum. This emerald and diamond brooch is supplied with an

Category

20th Century Unknown Brooches

Materials

Diamond, Emerald, 9k Gold, White Gold, Platinum, Gold

Diamond, Sapphire and Ruby American Flag Pin/Brooch
Diamond, Sapphire and Ruby American Flag Pin/Brooch

Diamond, Sapphire and Ruby American Flag Pin/Brooch

By Felix Vollman

Located in Bethesda, MD

From Felix Vollman, an American Flag lapel pin/brooch, The platinum pin was made from the original

Category

2010s American Brooches

Materials

Diamond, Ruby, Sapphire, Platinum

Victorian Ruby and Diamond Yellow Gold Bar Brooch
Victorian Ruby and Diamond Yellow Gold Bar Brooch

Victorian Ruby and Diamond Yellow Gold Bar Brooch

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H 0.29 in W 0.91 in L 1.73 in

Victorian Ruby and Diamond Yellow Gold Bar Brooch

Located in Jesmond, Newcastle Upon Tyne

gold and platinum. The brooch is supplied with an independent diamond grading report card. Images do

Category

Antique 1890s Unknown Victorian Brooches

Materials

Diamond, Ruby, 18k Gold, Yellow Gold, Platinum

Art Deco Emerald Sapphire and Diamond Bar Brooch
Art Deco Emerald Sapphire and Diamond Bar Brooch

Art Deco Emerald Sapphire and Diamond Bar Brooch

Located in London, GB

A French, Art Deco bar brooch, set with five calibre-cut emeralds, weighing an estimated total of

Category

Vintage 1920s French Art Deco Brooches

Materials

Diamond, Emerald, Onyx, Sapphire, Platinum

Antique Art Deco Platinum Yogo Gulch Sapphire Old Euro Diamond Bar Pin - GIA
Antique Art Deco Platinum Yogo Gulch Sapphire Old Euro Diamond Bar Pin - GIA

Antique Art Deco Platinum Yogo Gulch Sapphire Old Euro Diamond Bar Pin - GIA

Located in Great Neck, NY

Beautiful Antique Art Deco Platinum Yogo Gulch Sapphire Old Euro Diamond Bar Pin - GIA. This

Category

Vintage 1920s Art Deco Brooches

Materials

Diamond, Sapphire, Gold, 14k Gold, Yellow Gold, Platinum

Antique Art Deco Platinum Yogo Gulch Sapphire Old Euro Diamond Bar Pin - GIA
Antique Art Deco Platinum Yogo Gulch Sapphire Old Euro Diamond Bar Pin - GIA

Antique Art Deco Platinum Yogo Gulch Sapphire Old Euro Diamond Bar Pin - GIA

Located in Great Neck, NY

Beautiful Antique Art Deco Platinum Yogo Gulch Sapphire Old Euro Diamond Bar Pin - GIA. This

Category

Vintage 1920s Art Deco Brooches

Materials

Diamond, Sapphire, Gold, 14k Gold, Yellow Gold, Platinum

Antique Art Deco 18K Gold Platinum Ruby Diamond and Pearl Target Stick Pin
Antique Art Deco 18K Gold Platinum Ruby Diamond and Pearl Target Stick Pin

Antique Art Deco 18K Gold Platinum Ruby Diamond and Pearl Target Stick Pin

Located in Great Neck, NY

Beautiful Antique Art Deco 18K Gold Platinum Ruby Diamond and Pearl Target Stick Pin. This gorgeous

Category

Vintage 1920s Art Deco Brooches

Materials

Diamond, Pearl, Ruby, Gold, 18k Gold, Yellow Gold, Platinum

Art Deco Emerald and Diamond Arrow Jabot Pin
Art Deco Emerald and Diamond Arrow Jabot Pin

Art Deco Emerald and Diamond Arrow Jabot Pin

Located in London, GB

takes on the form of an arrow featuring rose cut diamonds and a single channel of square calibrated

Category

Vintage 1920s Art Deco Brooches

Materials

Diamond, Emerald, Gold, 18k Gold, Platinum

Art Deco Emerald and Diamond Platinum Brooch
Art Deco Emerald and Diamond Platinum Brooch

Art Deco Emerald and Diamond Platinum Brooch

Located in Chipping Campden, GB

and the diamond total is approx 2.24cts Modelled out of platinum. Brooch Dimensions: 48x24mm Weight

Category

Vintage 1920s British Art Deco More Jewelry

Materials

Diamond, Emerald, Platinum

Art Deco Platinum Diamond & Emerald Circle Brooch
Art Deco Platinum Diamond & Emerald Circle Brooch

Art Deco Platinum Diamond & Emerald Circle Brooch

Located in McLeansville, NC

An Art Deco platinum diamond and emerald circle brooch. This brooch features a curcular design set

Category

Vintage 1920s Art Deco Brooches

Materials

Diamond, Emerald, Platinum

Edwardian Sapphire Diamond Pearl Platinum Tennis Racket Brooch
Edwardian Sapphire Diamond Pearl Platinum Tennis Racket Brooch

Edwardian Sapphire Diamond Pearl Platinum Tennis Racket Brooch

Located in Philadelphia, PA

Bar style brooch designed as an antique tennis racket Hand woven platinum wire net cradles a 3.0

Category

Vintage 1910s French Edwardian Brooches

Materials

Diamond, White Diamond, Pearl, Sapphire, Blue Sapphire, Platinum

Platinum, Ruby and Diamond Clip
Platinum, Ruby and Diamond Clip

Platinum, Ruby and Diamond Clip

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H 1.75 in L 1.75 in

Platinum, Ruby and Diamond Clip

Located in New York, NY

-cut rubies ap. 2.85 cts., set with 2 old European and 2 square step-cut diamonds ap. .90 ct., set

Category

Mid-20th Century American Art Deco Brooches

Materials

Diamond, Ruby

Art Deco Sapphire and Diamond Stickpin of Platinum and 18k Gold
Art Deco Sapphire and Diamond Stickpin of Platinum and 18k Gold

Art Deco Sapphire and Diamond Stickpin of Platinum and 18k Gold

Located in Lewisburg, PA

square design set with deep blue sapphires and sparkling diamonds in platinum, perfectly capturing the

Category

Vintage 1920s Art Deco Brooches

Materials

Diamond, Sapphire, 18k Gold, Platinum

Art Deco Emerald and Diamond Bow Brooch
Art Deco Emerald and Diamond Bow Brooch

Art Deco Emerald and Diamond Bow Brooch

Located in London, GB

An Art Deco emerald and diamond bow brooch, the brooch in the form of a ribbon bow, set with

Category

Vintage 1920s Art Deco Brooches

Materials

Diamond, Emerald, 18k Gold, Platinum

Boivin brooch Yellow Gold and Platinum Square Diamonds and Sapphires
Boivin brooch Yellow Gold and Platinum Square Diamonds and Sapphires

Boivin brooch Yellow Gold and Platinum Square Diamonds and Sapphires

By René Boivin

Located in Ebene, MU

A Yellow gold and Platinum René Boivin brooch set with 38 old square cut diamonds and 15 calibré

Category

Vintage 1930s French Art Deco Brooches

Materials

White Diamond, Blue Sapphire, 18k Gold, Platinum

Art Déco Jabot Brooch Set with Diamonds
Art Déco Jabot Brooch Set with Diamonds

Art Déco Jabot Brooch Set with Diamonds

Located in Paris, IDF

A platinum Art Déco Jabot pin, set with square and brilliant cut diamonds.  Total weight of

Category

Vintage 1920s French Art Deco Brooches

Materials

Diamond, Platinum

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By John Galliano for Christian Dior, Christian Dior

Located in London, GB

Christian Dior by John Galliano pink silk brocade 3-piece suit comprising: blazer jacket with attached shawl edged with pink Calais lace, straight leg pants and mid-length wrap skirt...

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1990s French Suits, Outfits and Ensembles

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Square Diamond Platinum Brooch For Sale on 1stDibs

You are likely to find exactly the square diamond platinum brooch you’re looking for on 1stDibs, as there is a broad range for sale. Each design created in this style — which was crafted with great care and often made from Platinum, Gold and 18k Gold — can elevate any look. Our collection of these items for sale includes 27 vintage editions and 5 modern creations to choose from as well. Making the right choice when shopping for a square diamond platinum brooch may mean carefully reviewing examples of this item dating from different eras — you can find an early iteration of this piece from the 19th Century and a newer version made as recently as the 21st Century, both of which have proven very popular over the years. A square diamond platinum brooch from Oscar Heyman, Cellini and Felix Vollman — each of whom created a beautiful version of this treasured accessory — is worth considering. Today, if you’re looking for a square cut version of this piece and are unable to find the perfect match, our selection also includes round cut alternatives. There aren’t many items for men if you’re seeking a square diamond platinum brooch, as most of the options available are for women and unisex.

How Much is a Square Diamond Platinum Brooch?

The price for a square diamond platinum brooch starts at $1,450 and tops out at $52,000 with these brooches, on average, selling for $11,786.

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.