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Antique Platinum Hallmarks

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GIA Certified 1.50 Carat Edwardian Diamond Platinum Engagement Ring
Located in Hicksville, NY
Ring Size: 7 Metal Type: Platinum [Hallmarked, and Tested] Weight: 3.8 grams Center Diamond
Category

1910s Unknown Antique Platinum Hallmarks

Materials

Diamond, Platinum

Circa 1910s GIA 1.28ct Old European Diamond Platinum Engagement Ring - VEG#84b
Located in Hicksville, NY
: 1910s Ring Size: 6.5 Metal Type: Platinum [Hallmarked, and Tested] Weight: grams Center Diamond Details
Category

1910s Antique Platinum Hallmarks

Materials

Diamond, Platinum

GIA Certified 1.38 Carat Art Deco Diamond Platinum Engagement Ring
Located in Hicksville, NY
Ring Size: 6.5 Metal Type: Platinum [Hallmarked, and Tested] Weight: 2.8 grams Center Diamond
Category

1920s Unknown Art Deco Antique Platinum Hallmarks

Materials

Diamond, Platinum

GIA Certified 1.52 Carat Art Deco Diamond Platinum Engagement Ring
Located in Hicksville, NY
Ring Size: 4.5 Metal Type: Platinum [Hallmarked, and Tested] Weight: 3.4 grams Center Diamond
Category

1920s Unknown Art Deco Antique Platinum Hallmarks

Materials

Diamond, Platinum

GIA Certified 1.00 Carat Art Deco Diamond Platinum Engagement Ring
Located in Hicksville, NY
Ring Size: Metal Type: Platinum [Hallmarked, and Tested] Weight: grams Center Diamond Details: GIA
Category

1920s Unknown Art Deco Antique Platinum Hallmarks

Materials

Diamond, Platinum

GIA Certified 1.06 Carat Art Deco Diamond Platinum Engagement Ring
Located in Hicksville, NY
Ring Size: 9 Metal Type: Platinum [Hallmarked, and Tested] Weight: 4 grams Center Diamond Details
Category

1920s Unknown Art Deco Antique Platinum Hallmarks

Materials

Diamond, Platinum

GIA Certified 1.57 Carat Art Deco Diamond Platinum Engagement Ring
Located in Hicksville, NY
Ring Size: 8 Metal Type: Platinum [Hallmarked, and Tested] Weight: 4.4grams Center Diamond Details
Category

1920s Unknown Art Deco Antique Platinum Hallmarks

Materials

Diamond, Platinum

GIA Certified 1.02 Carat Art Deco Diamond Platinum Engagement Ring, VEG#1845
Located in Hicksville, NY
Ring Size: 6.5 Metal Type: Platinum [Hallmarked, and Tested] Weight: 2.9 grams Center Diamond
Category

1920s Unknown Art Deco Antique Platinum Hallmarks

Materials

Diamond, Platinum

1.06 Carat Total Weight Edwardian Diamond 14 Karat Gold/Platinum Engagement Ring
Located in Hicksville, NY
Ring Size: 5 Metal Type: 14K Yellow Gold and Platinum [Hallmarked, and Tested] Weight: 4.0 grams 2
Category

Early 1900s Unknown Edwardian Antique Platinum Hallmarks

Materials

Diamond, Gold, Platinum

GIA Certified 1.13 Carat Art Deco Diamond Platinum Engagement Ring
Located in Hicksville, NY
Ring Size: 6.25 Metal Type: Platinum [Hallmarked, and Tested] Weight: 2.9grams Center Diamond
Category

1920s Unknown Art Deco Antique Platinum Hallmarks

Materials

Diamond, Platinum

GIA 1.37 Carat Art Deco Platinum Diamond Old European Brilliant Engagement Ring
Located in Hicksville, NY
Year: 1920s Item Details: Ring Size: 6.75 Metal Type: Platinum [Hallmarked, and Tested] Weight
Category

1920s Unknown Art Deco Antique Platinum Hallmarks

Materials

Diamond, Platinum

GIA Certified 1.02 Carat Art Deco Diamond Platinum Engagement Ring
Located in Hicksville, NY
Ring Size: 4.75 Metal Type: Platinum [Hallmarked, and Tested] Weight: 2.4 grams Center Diamond
Category

1920s Unknown Art Deco Antique Platinum Hallmarks

Materials

Diamond, Platinum

GIA Certified 1.31 Carat Art Deco Diamond Platinum Engagement Ring
Located in Hicksville, NY
Ring Size: 7.1 Metal Type: Platinum [Hallmarked, and Tested] Weight: 3.3grams Center Diamond
Category

1920s Unknown Art Deco Antique Platinum Hallmarks

Materials

Diamond, Platinum

GIA Certified 1.31 Carat Total Weight Art Deco Diamond Platinum Engagement Ring
Located in Hicksville, NY
Item Details: Ring Size: 9 Metal Type: Platinum [Hallmarked, and Tested] Weight: 4.4 grams Center
Category

1920s Unknown Art Deco Antique Platinum Hallmarks

Materials

Diamond, Platinum

Platinum Art Deco Star Sapphire and Diamond Ring by Felger and Co.
Located in Hicksville, NY
Size: 5.25 (Sizable) Metal Type: Platinum [Hallmarked, and Tested] Weight: 6.4 grams Maker: FFF
Category

1920s Art Deco Antique Platinum Hallmarks

Materials

Diamond, Sapphire, Platinum

GIA Certified .72 Carat Art Deco Diamond Platinum Engagement Ring
Located in Hicksville, NY
Ring Size: 5 Metal Type: Platinum [Hallmarked, and Tested] Weight: 3.0 grams Center Diamond
Category

1920s Unknown Art Deco Antique Platinum Hallmarks

Materials

Diamond, Platinum

Circa 1920s Platinum 1.00ct Old European Brilliant Diamond Engagement Ring
Located in Hicksville, NY
: Year: 1920s Ring Size: 5.25 Metal Type: Platinum [Hallmarked, and Tested] Weight: 4.5 grams Center
Category

1920s Antique Platinum Hallmarks

Materials

Diamond, Platinum

GIA 1.40 Carat Total Weight Art Deco Diamond Platinum Engagement Ring
Located in Hicksville, NY
Year: 1920s Item Details: Ring Size: 6.25 Metal Type: Platinum [Hallmarked, and Tested] Weight
Category

1920s Unknown Art Deco Antique Platinum Hallmarks

Materials

Diamond, Platinum

Circa 1920s Platinum Art Deco 1.30cttw Diamond Filigree Ring - VEG#19a
Located in Hicksville, NY
Ring Size: 5.75 Metal Type: Platinum [Hallmarked, and Tested] Weight: 5.5 grams Center Diamond Details
Category

1920s Art Deco Antique Platinum Hallmarks

Materials

Diamond, Platinum

1900 s Diamond Pearl Yellow Gold Enamel Platinum Bar Brooch
Located in Stamford, CT
Stamped: 14k Tested: 14k & Platinum Hallmark: Spade with a "C" in it 4.2 grams Top to bottom: 5.22mm or
Category

Early 20th Century Antique Platinum Hallmarks

Materials

Diamond, Pearl, Gold, 14k Gold, Yellow Gold, Platinum, Enamel

Platinum Art Deco Onyx 7.00ct Old Mine Cut Diamond Brooch Brooch
Located in Hicksville, NY
Year: 1920s Item Details: Metal Type: Platinum [Hallmarked, and Tested] Weight: 16.5 grams Center
Category

1920s Art Deco Antique Platinum Hallmarks

Materials

Diamond, Platinum

Platinum Art Deco 2.42 Carat Unheated GIA Sapphire Engagement Ring
Located in Hicksville, NY
Year: 1920s Item Details: Ring Size: 5.25 Metal Type: Platinum [Hallmarked, and Tested] Weight
Category

1920s Unknown Art Deco Antique Platinum Hallmarks

Materials

Sapphire

1.80 Carat Total Weight Art Deco Diamond Platinum Engagement Ring
Located in Hicksville, NY
Year: 1920s Item Details: Ring Size: 7.75 Metal Type: Platinum [Hallmarked, and Tested] Weight
Category

1920s Unknown Art Deco Antique Platinum Hallmarks

Materials

Diamond, Platinum

Circa 1920s Platinum Antique Marquise Diamond and Emerald Engagement Ring - VEG#
Located in Hicksville, NY
: Year: 1920s Ring Size: 5.25 Metal Type: Platinum [Hallmarked, and Tested] Weight: 4.1 grams Center
Category

1920s Antique Platinum Hallmarks

Materials

Diamond, Emerald, Platinum

GIA Certified .77 Carat Art Deco Diamond Platinum Engagement Ring
Located in Hicksville, NY
Ring Size: 4.25 Metal Type: Platinum [Hallmarked, and Tested] Weight: 6.3 grams Center Diamond
Category

1920s Unknown Art Deco Antique Platinum Hallmarks

Materials

Diamond, Platinum

1920s Platinum GIA Old European Brilliant Diamond and Sapphire Engagement Ring
Located in Hicksville, NY
Year: 1920s Item Details: Ring Size: 6.5 (Sizeable) Metal Type: Platinum [Hallmarked, and Tested
Category

1920s Unknown Art Deco Antique Platinum Hallmarks

Platinum Art Deco GIA .68 Carat Old European Diamond Engagement Ring
Located in Hicksville, NY
Year: 1920s Item Details: Ring Size: 5.25 Metal Type: Platinum [Hallmarked, and Tested] Weight
Category

1920s Unknown Art Deco Antique Platinum Hallmarks

Materials

Diamond, Platinum

.90 Carat Total Weight Art Deco Diamond Emerald Platinum Engagement Ring
Located in Hicksville, NY
Item Details: Ring Size:6.25 Metal Type: platinum [Hallmarked, and Tested] Weight: 4.8 grams
Category

1920s Unknown Art Deco Antique Platinum Hallmarks

Materials

Diamond, Emerald, Platinum

1880s Brook Son Platinum Jabot Pin with Drop Section with Original Box
Located in Hicksville, NY
Metal Type: Platinum [Hallmarked, and Tested] Weight: 6.6grams Diamond Details: .75ct total weight
Category

1880s Unknown Victorian Antique Platinum Hallmarks

Materials

Platinum

18 Karat Gold and Platinum Emerald Diamond Brooch Pendant
Located in Hicksville, NY
Year: 1910 Item Details: Metal Type: 18K Yellow Gold and Platinum [Hallmarked, and Tested] Weight
Category

1910s Unknown Edwardian Antique Platinum Hallmarks

Materials

Diamond, Emerald, Gold, Platinum

1.10 Carat Total Weight Art Deco Diamond Platinum Engagement Ring
Located in Hicksville, NY
Year: 1920s Item Details: Ring Size: 6.75 Metal Type: Platinum [Hallmarked, and Tested] Weight
Category

1920s Unknown Art Deco Antique Platinum Hallmarks

Materials

Diamond, Platinum

GIA Certified 1.02 Carat Art Deco Diamond Platinum Engagement Ring
Located in Hicksville, NY
Ring Size: 6.75 Metal Type: Platinum [Hallmarked, and Tested] Weight: 3.9 grams This ring includes
Category

1920s Unknown Art Deco Antique Platinum Hallmarks

Materials

Diamond, Platinum

GIA Certified 1.26 Carat Total Weight Art Deco Diamond Platinum Engagement Ring
Located in Hicksville, NY
Item Details: Ring Size: 6.5 Metal Type: Platinum [Hallmarked, and Tested] Weight: 3.7 grams
Category

1920s Unknown Art Deco Antique Platinum Hallmarks

Materials

Diamond, Platinum

Edwardian Platinum GIA 1.33ct Old Mine Brilliant Diamond Engagement Ring
Located in Hicksville, NY
Ring Size: 6.5 Metal Type: Platinum [Hallmarked, and Tested] Weight: 4.1 grams Center Diamond
Category

1910s Unknown Edwardian Antique Platinum Hallmarks

Platinum Bracelet with 8 Carat Trapeze, Emerald and Old Mine Cut Diamonds
Located in Antwerp, BE
Diamonds: Old Mine ,Trapeze & emerald cut diamonds, together ca. 8 cts Material: Platinum Hallmark : dog
Category

Early 20th Century Art Deco Antique Platinum Hallmarks

Materials

Diamond, 18k Gold, White Gold

GIA .88 Carat Art Deco Diamond Platinum Engagement Ring
Located in Hicksville, NY
Ring Size: 5.75 Metal Type: Platinum [Hallmarked, and Tested] Weight: 4.2 grams Diamond Details
Category

1920s Unknown Art Deco Antique Platinum Hallmarks

Materials

Diamond, Platinum

Art Deco Ring in Platinum Sapphire and Diamonds 1920 1930
Located in Paris, FR
17.5 Size 54 US size: 6.75 Platinum Hallmark: Dog's head Gross Weight: 8.6g
Category

1920s French Art Deco Antique Platinum Hallmarks

Materials

Diamond, Sapphire, Blue Sapphire, Platinum

Circa 1900s Platinum GIA Unheated “Royal Blue” Sapphire Diamond Ring - VEG#70b
Located in Hicksville, NY
: 1900s Ring Size: 5 Metal Type: Platinum [Hallmarked, and Tested] Weight: 6.0 grams Center Sapphire
Category

Early 1900s Antique Platinum Hallmarks

Materials

Diamond, Sapphire, Platinum

Edwardian 18 Karat Yellow Gold Wedding Ring
Located in Hicksville, NY
Ring Size: 8.5 Metal Type: 18K Yellow Gold and Platinum [Hallmarked, and Tested] Weight: 3.9grams
Category

Early 1900s Unknown Edwardian Antique Platinum Hallmarks

Materials

Yellow Gold

GIA 3 Stone 1.40 Carat Art Deco Diamond Platinum Engagement Ring
Located in Hicksville, NY
Ring Size: 6.25 Metal Type: Platinum [Hallmarked, and Tested] Weight: 4.9 grams Center Diamond
Category

1920s Unknown Art Deco Antique Platinum Hallmarks

Materials

Diamond, Platinum

1920s Platinum Art Deco Geometric Old European Diamond Brooch
Located in Hicksville, NY
flanking the center stone. A true antique one of one. Year: 1920s Item Details: Metal Type: Platinum
Category

1920s Unknown Art Deco Antique Platinum Hallmarks

Materials

Diamond, Platinum

Circa 1920s GIA 1.00ct Old European Brilliant Diamond Engagement Ring
Located in Hicksville, NY
Year: 1920s Item Details: Ring Size: 4.75 Metal Type: Platinum [Hallmarked, and Tested] Weight
Category

1920s Antique Platinum Hallmarks

Materials

Diamond, Platinum

Circa 1920s GIA .99ct Old European Brilliant Diamond Engagement Ring
Located in Hicksville, NY
Year: 1920s Item Details: Ring Size: 7.5 Metal Type: Platinum [Hallmarked, and Tested] Weight: 3.9
Category

1920s Antique Platinum Hallmarks

Materials

Diamond, Platinum

1.12 Carat Cushion Natural Pink Sapphire Diamond Halo Platinum Engagement Ring
Located in Stamford, CT
weight .50cts, G - H, VS2 Size 6 and sizeable Platinum Stamped: Plat Tested: Platinum Hallmark: Not
Category

Early 20th Century Antique Platinum Hallmarks

Materials

Diamond, Sapphire, Pink Sapphire, Platinum

Circa 1920s GIA 1.10ct Old European Brilliant Diamond Engagement Ring
Located in Hicksville, NY
Year: 1920s Item Details: Ring Size: 7.25 Metal Type: Platinum [Hallmarked, and Tested] Weight
Category

1920s Antique Platinum Hallmarks

Materials

Diamond, Platinum

Circa 1900s Edwardian Old European Diamond Filigree Ring
Located in Hicksville, NY
Year: 1900s Item Details: Ring Size: 8.75 (Sizable) Metal Type: Platinum [Hallmarked, and Tested
Category

Early 1900s Antique Platinum Hallmarks

Materials

Diamond, Blue Diamond, Platinum

Circa 1900s Theodule Boudier French Jabot Pin with Buddha
Located in Hicksville, NY
Item Details: Metal Type: 18K Yellow Gold and Platinum [Hallmarked, and Tested] Weight: 7.0 grams
Category

Early 20th Century Antique Platinum Hallmarks

Materials

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

Circa 1920s GIA 1.08ct Old European Diamond Engagement Ring
Located in Hicksville, NY
Year: 1920s Item Details: Ring Size: 7.25 Metal Type: Platinum [Hallmarked, and Tested] Weight
Category

1920s Antique Platinum Hallmarks

Materials

Diamond, Platinum

Circa 1920s GIA 2.58ct Old European Brilliant Diamond Engagement Ring
Located in Hicksville, NY
Year: 1920s Item Details: Ring Size: 6.25 Metal Type: Platinum [Hallmarked, and Tested] Weight
Category

1920s Antique Platinum Hallmarks

Materials

Diamond, Platinum

Circa 1920s GIA 1.12ct Old European Brilliant Diamond Engagement Ring
Located in Hicksville, NY
Year: 1920s Item Details: Ring Size: 5.75 Metal Type: Platinum [Hallmarked, and Tested] Weight: 3.4
Category

1920s Antique Platinum Hallmarks

Materials

Diamond, Platinum

Circa 1910s GIA 1.10ct Old European Brilliant Diamond Engagement Ring
Located in Hicksville, NY
Year: 1910s Item Details: Ring Size: 8.25 Metal Type: Platinum [Hallmarked, and Tested] Weight: 4.4
Category

1910s Antique Platinum Hallmarks

Materials

Diamond, Platinum

Circa 1890s Old Miner Diamond and Sapphire Ring
Located in Hicksville, NY
Year: 1890s Item Details: Ring Size: 5.75 Metal Type: Platinum [Hallmarked, and Tested] Weight: 3.8
Category

1890s Antique Platinum Hallmarks

Materials

Diamond, Sapphire, Platinum

Circa 1920s Art Deco .85ct Old European Brilliant Diamond Engagement Ring
Located in Hicksville, NY
Year: 1920s Item Details: Ring Size: 8.75 Metal Type: Platinum [Hallmarked, and Tested] Weight: 3.1
Category

1920s Art Deco Antique Platinum Hallmarks

Materials

Diamond, Platinum

Circa 1920s Unheated Pink Sapphire and Diamond Art Deco Ring
Located in Hicksville, NY
Year: 1920s Item Details: Ring Size: 5 Metal Type: Platinum [Hallmarked, and Tested] Weight: 3.4
Category

1920s Art Deco Antique Platinum Hallmarks

Materials

Diamond, Pink Sapphire, Platinum

Circa 1920s Art Deco Emerald and Old European Diamond Engagement Ring
Located in Hicksville, NY
Year: 1920s Item Details: Ring Size: 5.25 Metal Type: Platinum [Hallmarked, and Tested] Weight: 4.4
Category

1920s Art Deco Antique Platinum Hallmarks

Materials

Diamond, Emerald, Platinum

Circa 1920S GIA 1.70ct Old European Brilliant Diamond Engagement Ring
Located in Hicksville, NY
Year: 1920s Item Details: Ring Size: 4.5 Metal Type: Platinum [Hallmarked, and Tested] Weight: 2.9
Category

1920s Art Deco Antique Platinum Hallmarks

Materials

Diamond, Platinum

Circa 1920s Pltainum Old European Diamond and Onyx Ring
Located in Hicksville, NY
Year: 1920s Item Details: Ring Size: 8.25 (Sizable) Metal Type: Platinum [Hallmarked, and Tested
Category

1920s Antique Platinum Hallmarks

Materials

Diamond, Onyx, Platinum

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Antique Platinum Hallmarks For Sale on 1stDibs

Find an expansive variety of antique platinum hallmarks available on 1stDibs. These distinct designs — crafted with great care and often made from platinum, gold and 18k gold — can elevate any look. Our collection is diverse and broad-ranging, and pieces in stock date back to the 18th Century while others were produced as recently as the 20th Century. Our collection of antique platinum hallmarks includes designs that are universally popular, but Edwardian and Art Deco styles, specifically, are sought with frequency. Versions of these items have been a part of the life’s work for many jewelers, but those produced by Cartier, Tiffany Co. and Hamilton are consistently popular. Today, if you’re looking for old european cut antique platinum hallmarks and are unable to find the perfect match, our selection also includes round cut and old mine cut alternatives. There aren’t many items for men in our collection of antique platinum hallmarks, as most of the options available are for women.

How Much are Antique Platinum Hallmarks?

Prices for antique platinum hallmarks can differ depending upon size, time period and other attributes — at 1stDibs, these accessories begin at $556 and can go as high as $206,353, while antique platinum hallmarks, on average, fetch $5,500.

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.  

Questions About Antique Platinum Hallmarks
  • 1stDibs ExpertNovember 2, 2023
    Yes, some antique rings have hallmarks. However, some do not. Before 1950, jewelry makers didn't add hallmarks to their pieces, but some did to indicate who produced the jewelry and/or tell the buyer what type of metals they contained. Shop a large collection of antique rings on 1stDibs.