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Antique Platinum Hallmarks

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Circa 1900s GIA .92ct Old European Brilliant Diamond Engagement Ring - VEG#25b
Located in Hicksville, NY
: 1900s Ring Size: 7.25 Metal Type: Platinum [Hallmarked, and Tested] Weight: 2.7 grams Center Diamond
Category

Early 1900s Antique Platinum Hallmarks

Materials

Diamond, Platinum

Edwardian Diamond and 18 Carat Gold Solitaire Ring
Located in Chipping Campden, GB
has wonderful sparkle. The ring is modelled out of 18carat gold and the stone is set in platinum
Category

Early 1900s British Edwardian Antique Platinum Hallmarks

Materials

Diamond, Gold, Platinum

Circa 1910 GIA 1.11ct D Color Old European Diamond Engagement Ring - VEG#27b
Located in Hicksville, NY
Details: Ring Size: 6 Metal Type: Platinum [Hallmarked, and Tested] Weight: 2.9 grams Center Diamond
Category

1910s Antique Platinum Hallmarks

Materials

Diamond, Platinum

1920s Art Deco GIA 1.04ct Old European Diamond and Emerald Engagement Ring -
Located in Hicksville, NY
: Year: 1920s Ring Size: 6.25 Metal Type: Platinum [Hallmarked, and Tested] Weight: 3.2 grams Center
Category

1920s Art Deco Antique Platinum Hallmarks

Materials

Diamond, Platinum

Art Deco 1920s GIA 2.70ct Old European Diamond and Sapphire Engagement Ring
Located in Hicksville, NY
: Year: 1920s Ring Size: 7 Metal Type: Platinum [Hallmarked, and Tested] Weight: 4.4 grams Center
Category

1920s Art Deco Antique Platinum Hallmarks

Materials

Diamond, Sapphire, Platinum

GIA Certified .73 Carat Art Deco Diamond 14 Karat Yellow Gold Engagement Ring
Located in Hicksville, NY
Ring Size: 6.25 Metal Type: 14K Yellow Gold and Platinum [Hallmarked, and Tested] Weight: 1.9 grams
Category

1920s Unknown Art Deco Antique Platinum Hallmarks

Materials

Diamond, Yellow Gold

GIA Certified 1.14 Carat Diamond Engagement Ring
Located in Hicksville, NY
Ring Size: 4.75 Metal Type: Platinum [Hallmarked, and Tested] Weight: 5.3grams Center Diamond
Category

1920s Unknown Art Deco Antique Platinum Hallmarks

Antique 14k Yellow Gold Platinum Top 0.51ct Ruby and Diamond Halo Ring
Located in New York, NY
, 0.3tcw Diamond Measurements: 21.2 x 17.5 x 11.85mm Size: 4.5 Metal: 14k Gold and Platinum Hallmark: 14k
Category

Late 19th Century Antique Platinum Hallmarks

Materials

Diamond, Ruby, 14k Gold, Yellow Gold

Circa 1900s GIA Fancy Brown Old European Brilliant Diamond Engagement Ring
Located in Hicksville, NY
: Year: 1900s Ring Size: 7 Metal Type: Platinum [Hallmarked, and Tested] Weight: 3.7 grams Center
Category

Early 1900s Antique Platinum Hallmarks

Materials

Brown Diamond, Platinum

1926 Engraved Art Deco Unheated Sapphire and Diamond Ring
Located in Hicksville, NY
Year: 1926 (Engraved on shank) Item Details: Ring Size: 5.25 Metal Type: Platinum [Hallmarked, and
Category

1920s Art Deco Antique Platinum Hallmarks

Materials

Diamond, Platinum

GIA Certified 1.72 Carat Diamond Engagement Ring
Located in Hicksville, NY
Ring Size: 6 Metal Type: Platinum [Hallmarked, and Tested] Weight: 3.0 grams Center Diamond
Category

1920s Unknown Art Deco Antique Platinum Hallmarks

GIA Certified .73 Carat Engagement Ring
Located in Hicksville, NY
Ring Size: 6 Metal Type: Platinum [Hallmarked, and Tested] Weight: 3.2 grams Center Diamond
Category

1920s Unknown Art Deco Antique Platinum Hallmarks

Art Deco 2.40 Ct Diamond Platinum Drop Earrings
Located in Napoli, IT
Metal: platinum Hallmarks: assay present but worn Gems: 2 old European cut diamonds totalling approx .60
Category

1920s European Art Deco Antique Platinum Hallmarks

Materials

Diamond, Platinum

Edwardian 1.65 Ct Diamond Daisy Platinum 18 KT Necklace
Located in Napoli, IT
platinum Hallmarks: none/worn Gems: 1 old European cut diamond of approx .65 Ct (G/SI2) – 10 old mine cut
Category

Early 1900s European Edwardian Antique Platinum Hallmarks

Materials

Diamond, Platinum

Edwardian Untreated 2.7 Ct Green Jade Diamond Platinum Ring
Located in Napoli, IT
collection Further Details Below Metal: platinum Hallmarks: assay and maker Gems: 1 marquise cabochon cut
Category

Early 1900s European Edwardian Antique Platinum Hallmarks

Materials

Diamond, Jade, Platinum

GIA Certified 1.03 Carat Art Deco Diamond 14 Karat Yellow Gold Engagement Ring
Located in Hicksville, NY
Ring Size: 6.5 Metal Type: 14K Yellow Gold and Platinum [Hallmarked, and Tested] Weight: 2.6grams
Category

1920s Unknown Art Deco Antique Platinum Hallmarks

Materials

Diamond, Yellow Gold

Art Deco 1.60 Ct Sapphire 1.40 Ct Diamond Platinum ring
Located in Napoli, IT
worn Further Details Below Metal: platinum Hallmarks: assay Gems: 2 natural unheated blue sapphires
Category

1920s European Art Deco Antique Platinum Hallmarks

Materials

Diamond, Sapphire, Platinum

Art Nouveau 9.50 Ct Diamond Natural Pearl 18 Kt Platinum Bracelet
Located in Napoli, IT
Excellent condition keeping with age Metal: 18 Kt yellow gold and platinum Hallmarks: assay (for both
Category

Early 20th Century European Art Nouveau Antique Platinum Hallmarks

Materials

Diamond, Natural Pearl, 18k Gold, Platinum

Circa 1920s Old European 3 Stone Diamond and Emerald Engagement Ring
Located in Hicksville, NY
: 1920s Ring Size: 5 Metal Type: Platinum [Hallmarked, and Tested] Weight: 3.2 grams Center Diamond
Category

1920s Classical Roman Antique Platinum Hallmarks

Materials

Diamond, Emerald, Platinum

Rare Art Deco Tank Ring - Platinum and Diamonds
Located in PARIS, FR
: estimated G • Diamond Clarity: estimated VS1–VS2 • Hallmark: French platinum hallmark • Dimensions: 20
Category

1920s French Art Deco Antique Platinum Hallmarks

Materials

Diamond, Platinum

GIA Certified .99 Carat Diamond Engagement Ring
Located in Hicksville, NY
Ring Size: 7.5 Metal Type: Platinum [Hallmarked, and Tested] Weight: 3.6 grams Center Diamond
Category

1920s Unknown Art Deco Antique Platinum Hallmarks

Art Deco 2.60 Ct Diamond Twist Platinum Ring
Located in Napoli, IT
together This ring can be re-sized Further Details Below Metal: platinum Hallmarks: assay Gems: 2 old
Category

1920s European Art Deco Antique Platinum Hallmarks

Materials

Diamond, Platinum

Edwardian 18K Yellow Gold Platinum Pearl and Diamond Halo Cluster Ring
Located in MONTMORENCY, FR
in 18K yellow gold and platinum (hallmarked “750” and “950”), centering on a lustrous round pearl
Category

Early 20th Century French Edwardian Antique Platinum Hallmarks

Materials

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

Art Deco Platinum 18kt Gold Ring with Colombian Emerald and Old Cut Diamonds
Located in Braintree, GB
1920s • Metal: 18kt gold and platinum (hallmarked) • Centre Gemstone: Colombian emerald, approx. 0.50 ct
Category

1920s French Art Deco Antique Platinum Hallmarks

Materials

Diamond, Emerald, Gold, 18k Gold, Platinum

Edwardian .85 Ct Diamond .35 Ct Sapphire 18 KT Platinum Ring
Located in Napoli, IT
example Metal: 18 Kt yellow gold and platinum Hallmarks: assay, slightly worn Gems: 1 old mine cut
Category

Early 1900s European Edwardian Antique Platinum Hallmarks

Materials

Diamond, Sapphire, 18k Gold, Platinum

French Art Deco Rose Cut Diamond Virgin Mary 18 KT Platinum Pendant
Located in Napoli, IT
Details Below Metal: 18 Kt yellow and platinum Hallmarks: French – engraved 22 Julio 1926 Gems: 25
Category

1920s French Art Deco Antique Platinum Hallmarks

Materials

Diamond, 18k Gold, Platinum

Circa 1920s Art Deco Platinum 2.50cttw Antique Marquise French Cut Diamond Pin
Located in Hicksville, NY
Item Details: Metal Type: Platinum [Hallmarked, and Tested] Weight: 7.3grams Diamonds Details
Category

1920s Art Deco Antique Platinum Hallmarks

Materials

Diamond, Platinum

Art Deco 2.15 Ct Sapphire 1.0 Ct Diamond 18 KT Platinum Ring
Located in Napoli, IT
15 mm. Metal: 18 Kt yellow gold and platinum Hallmarks: assay for both Gems: 1 oval cushion faceted
Category

1920s Art Deco Antique Platinum Hallmarks

Materials

Diamond, Sapphire, 18k Gold, Platinum

1920 Art Deco Platinum Ring with Diamonds and Sapphires
Located in Aventura, FL
) • Ring Width: 0.40 inches • Stamped: Platinum hallmarks • Total weight: 5.6 grams / 3.6 dwt • Collateral
Category

1920s Art Deco Antique Platinum Hallmarks

Materials

Diamond, White Diamond, Sapphire, Platinum

Antique 1920s Diamonds 0.95ct Total Set in New Platinum Engagement Ring Mount
Located in Brighton, GB
Antique Diamond Ring Platinum Hallmarked Circa 1920’s Fabulous antique diamond ring. The
Category

Early 20th Century European Antique Platinum Hallmarks

Materials

Diamond, Platinum

Art Deco Platinum Ring with Diamonds and Sapphires
Located in Aventura, FL
inches • Stamped: Platinum hallmarks • Total weight: 5.7 grams / 3.6 dwt • Collateral: This piece is
Category

1920s Art Deco Antique Platinum Hallmarks

Materials

Diamond, Sapphire, Platinum

French Art Deco 1.90 Ct Diamond Solitaire Plus Platinum Engagement Ring
Located in Napoli, IT
special lucky one! Further Details Below Metal: platinum Hallmarks: French assay Gems: 1 old European
Category

1920s French Art Deco Antique Platinum Hallmarks

Materials

Diamond, Platinum

French 1920s Diamond and Platinum Solitaire Engagement Ring
Located in Jesmond, Newcastle Upon Tyne
elevated, pierced decorated ring shoulders blend seamlessly with the platinum hallmarked shank. The
Category

1920s French Antique Platinum Hallmarks

Materials

Diamond, Platinum

Circa 1920s Art Deco Platinum 1.50cttw Old Mine Cut Cluster Diamond Ring
Located in Hicksville, NY
Year: 1930s Item Details: Ring Size: 7 Metal Type: Platinum [Hallmarked, and Tested] Weight: 9.8
Category

1920s Art Deco Antique Platinum Hallmarks

Materials

Diamond, Platinum

1920 Art Deco Platinum Ring with 1.25 Cts in Diamonds and Sapphires
Located in Aventura, FL
& Sapphire • Ring Size: 7 (sizable) • Ring Width: 0.45 inches • Stamped: Platinum hallmarks • Total weight
Category

1920s Art Deco Antique Platinum Hallmarks

Materials

Diamond, White Diamond, Sapphire, Platinum

Art Deco French Natural Red Coral 2.50 Ct Diamond Platinum earrings
Located in Napoli, IT
have been hand fabricated of solid Platinum, bearing French hallmarks The striking design artfully
Category

1920s French Art Deco Antique Platinum Hallmarks

Materials

Coral, Diamond, Platinum

Art Deco 1920 Platinum Necklace with Emerald and Diamonds
Located in Aventura, FL
: Platinum hallmarks • Total weight: 5.1 grams / 3.3 dwt • Collateral: This piece is accompanied by a
Category

1920s Art Deco Antique Platinum Hallmarks

Materials

Diamond, White Diamond, Emerald, Platinum

French, 19th Century Pearl Diamonds Yellow Gold Platinum Charles Templier Brooch
Located in Poitiers, FR
Brooch in 18 karat yellow gold, eagle's head hallmark, and platinum. Hallmarked by the master
Category

19th Century French Napoleon III Antique Platinum Hallmarks

Materials

Diamond, White Diamond, Pearl, Natural Pearl, Gold, 18k Gold, Platinum, ...

Edwardian 1.20 Ct Diamond Solitaire Natural Pearl Platinum /Gold Necklace
Located in Napoli, IT
platinum Hallmarks: European from the period Gems: 1 old mine cushion cut diamond of approx 1.20 Ct (6.58
Category

Early 1900s European Edwardian Antique Platinum Hallmarks

Materials

Diamond, Natural Pearl, Gold, Platinum

1920 Art Deco Platinum Ring with 3.00 Cts in Diamonds and Rubies
Located in Aventura, FL
Size: 6 3/4 (sizable) • Ring Width: 0.32 inches • Stamped: Platinum hallmarks • Total weight: 5.6 grams
Category

1920s Art Deco Antique Platinum Hallmarks

Materials

Diamond, White Diamond, Ruby, Platinum

Marcus Co. GIA 6.35 Carat Diamond Platinum Three-Stone Engagement Ring
By Marcus Co.
Located in Stamford, CT
grams Tested: Platinum Hallmark: Marcus Please Note, we photograph each item as accurately as possible
Category

Early 20th Century Unknown Antique Platinum Hallmarks

Materials

Diamond, Platinum

Art Nouveau .75 Ct Diamond F VVS/VS Platinum Rare Engagement ring
Located in Napoli, IT
with endless sparkle through a discrete elegant mount Hallmarked for Platinum, it can easily re-size
Category

Early 20th Century European Art Nouveau Antique Platinum Hallmarks

Materials

Diamond, Platinum

Belle Epoque French .95 Ct Natural Sapphire 5.0 Ct Diamond Platinum Pendant
Located in Napoli, IT
Further Details Below Metal: Platinum Hallmarks: French assay Gems: 1 oval cabochon cut natural blue
Category

Early 20th Century French Belle Époque Antique Platinum Hallmarks

Materials

Diamond, Sapphire, Platinum

Rectangular European Old Mine Diamond Cluster Ring, Early 20th Century
Located in London, GB
diamonds Metal: Platinum Hallmarks: no hallmarks
Category

Early 20th Century Art Deco Antique Platinum Hallmarks

Materials

Platinum

Art Deco Certified 7.14 Ct No Heat Sapphire Diamond Platinum Ring
Located in Napoli, IT
material Further Details Below Metal: platinum Hallmarks: assay – sapphire and diamonds Ctw Gems: 1 oval
Category

1920s European Art Deco Antique Platinum Hallmarks

Materials

Diamond, Sapphire, Platinum

1.18 Carat Diamond and Platinum Solitaire Engagement Ring
Located in Jesmond, Newcastle Upon Tyne
curvilinear design. The ring shoulders blend seamlessly with the grove decorated platinum hallmarked shank
Category

Early 1900s Contemporary Antique Platinum Hallmarks

Materials

Diamond, Platinum

1930s Art Deco Platinum Brooch Carved Jadeite Jade Old European Cut Diamonds
Located in New York, NY
: Art Deco, Circa 1930s Metal: Platinum, hallmarked with #361 (twice) Gemstones: Center: Carved
Category

Early 20th Century American Art Deco Antique Platinum Hallmarks

Materials

Onyx, Jade, Diamond, Platinum

Antique Hallmarked Platinum 18kt Gold Ring with Colombian Emeralds and VVS Old
Located in Aventura, FL
This exceptional antique ring is beautifully crafted in platinum and 18kt yellow gold, featuring a
Category

19th Century Antique Platinum Hallmarks

Materials

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

Art Deco 5 Carat Ruby and 20ct Diamond Platinum Bracelet with French Hallmarks
Located in Philadelphia, PA
Art Deco platinum ruby and diamond bracelet with French Hallmarks. This bracelet contains 8
Category

Early 20th Century Art Deco Antique Platinum Hallmarks

Materials

Diamond, Ruby, Platinum

1900s Antique French 3.24 Carat Diamond and Platinum Cocktail Ring
Located in Jesmond, Newcastle Upon Tyne
shank. The exterior of the ring shank is hallmarked with the French platinum hallmark (dog's head
Category

1910s French Antique Platinum Hallmarks

Materials

Diamond, Platinum

4.89 Carat Diamond and Platinum Solitaire Engagement Ring
Located in Jesmond, Newcastle Upon Tyne
with the plain platinum hallmarked shank. The contemporary platinum shank is hallmarked to the
Category

Early 1900s Unknown Contemporary Antique Platinum Hallmarks

Materials

Diamond, 14k Gold, Platinum

1920s, Antique French 3.46 Carat Diamond and Natural Pearl Platinum Brooch
Located in Jesmond, Newcastle Upon Tyne
cut diamonds. The antique pearl brooch secures to the reverse with a platinum hallmarked hinged pin
Category

1920s Unknown Antique Platinum Hallmarks

Materials

Diamond, Natural Pearl, Platinum

Edwardian 16.40 Ct Aquamarine Diamond necklace
Located in Napoli, IT
Great addition to any valuable collection Metal: platinum Hallmarks: assay Gems: 1 pear faceted cut
Category

Early 1900s European Edwardian Antique Platinum Hallmarks

Materials

Aquamarine, Diamond, 18k Gold

Platinum Diamond Bracelet Vintage Pery Watch GIA Deco VVS Rare Fine 10.04 Carats
Located in Sylvania, GA
Color approx. 10.04 Carats! Weight: 41.9 Grams Heavy SOLID PLATINUM (Hallmarked & Guaranteed) Good
Category

Early 20th Century Art Deco Antique Platinum Hallmarks

Materials

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

Art Deco Certified 2.83 Burma Sapphire Diamond Rare Ring
Located in Napoli, IT
history Very good wearable condition with no pits of any sort Metal: platinum Hallmarks: French import
Category

Early 20th Century European Art Deco Antique Platinum Hallmarks

Materials

Diamond, Sapphire, Platinum

French Belle Epoque 1.30 Ct Diamond Plus You Me Ring
Located in Napoli, IT
crafted during the era of solid 18 Kt gold and Platinum, bearing French hallmarks for both Timeless
Category

Early 20th Century French Belle Époque Antique Platinum Hallmarks

Materials

Diamond, 18k Gold, Platinum

Art Deco Colombian Emerald Diamond Bow Ring
Located in Napoli, IT
yellow gold and platinum Hallmarks: assay for both and maker (quite worn) Gems: 1 emerald faceted cut
Category

1920s Austrian Art Deco Antique Platinum Hallmarks

Materials

Diamond, Emerald, 18k Gold, 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.