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Antique Platinum Hallmarks

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Edwardian Cluster Ring, Unheated Burmese Ruby 1.60 Cts, Diamond Surround
Located in PARIS, FR
Edwardian engagement cluster ring in 18Kt rose gold and platinum (hallmarks: owl and mascaron
Category

Early 20th Century European Edwardian Antique Platinum Hallmarks

Materials

Diamond, Ruby

Magnificent Art Deco Certified 7.14 Carat 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 Art Deco Antique Platinum Hallmarks

Materials

Diamond, Sapphire, Platinum

Art Nouveau 9.50 Carat Diamond Natural Pearls Rare Bracelet
Located in Napoli, IT
platinum Hallmarks: assay (for both) and maker Gems: 3 natural Basra pearls of 6 mm. in diameter each – 24
Category

1880s Art Nouveau Antique Platinum Hallmarks

Materials

Diamond, Natural Pearl, 18k Gold, Platinum

Art Deco 1920s Certified 7.37 Carat Diamond Emerald Platinum Pendant Necklace
Located in Berlin, Berlin
, approx. 5.37 ct altogether, Top Wesselton/G – Wesselton/H, si-pi2 Platinum HALLMARKS The chain
Category

1920s Unknown Art Deco Antique Platinum Hallmarks

Materials

Diamond, White Diamond, Emerald, Platinum

Edwardian Austro Hungarian Diamond Trilogy Ring
Located in Napoli, IT
Further Details Below Metal: 18 Kt rose gold and platinum Hallmarks: Austro Hungarian assay Gems: 3 old
Category

Early 1900s Austrian Edwardian Antique Platinum Hallmarks

Materials

Diamond, Sapphire, 18k Gold, Platinum

Hallmarked 18-Karat Gold, Platinum and Diamond Five-Stone Ring
Located in East Sussex, GB
is solid 18-carat yellow gold knife edge shank. Hallmarked 18ct and Platinum Total weight of
Category

1890s British Victorian Antique Platinum Hallmarks

Materials

Gold

Edwardian Natural Jade and Diamond Panel Ring
Located in Napoli, IT
! Further Details Below Metal: 14 Kt gold and platinum Hallmarks: assay Gems: 1 round cabochon cut natural
Category

Early 1900s Edwardian Antique Platinum Hallmarks

Materials

Diamond, Jade, 14k Gold

Edwardian Diamond Solitaire Ring 18 Carat Gold circa 1915 Engagement Ring
Located in Lancaster, Lancashire
18ct Yellow Gold and Platinum, hallmarked PLAT 18CT. The central Diamond is 0.65ct in size. Diamond
Category

1910s British Edwardian Antique Platinum Hallmarks

Materials

Diamond, 18k Gold, Yellow Gold, Platinum

French Belle Époque Natural Salt Water Pearl 2.60 Ct G VVS Diamond Cluster Ring
Located in Napoli, IT
Details Below Metal: 18 Kt gold and platinum Hallmarks: French import duty Gems: 1 natural (not nucleated
Category

Early 1900s Belle Époque Antique Platinum Hallmarks

Materials

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

Art Deco 1.60 Carat Natural Sapphire and 1.40 Carat Old Cut Diamond Rare Ring
Located in Napoli, IT
intricate artwork Ring has been hand crafted from solid PLATINUM marked Two Natural NO HEAT or treated
Category

1920s Art Deco Antique Platinum Hallmarks

Materials

Diamond, Sapphire, Platinum

Edwardian Rare Twin Celestial Crescent Brooches Natural Pearls Natural Sapphire
Located in Napoli, IT
Details Below Metal: 14 Kt gold and platinum Hallmarks: assay and maker Gems: 25 natural (not nucleated
Category

Early 1900s Edwardian Antique Platinum Hallmarks

Materials

Natural Pearl, Sapphire, Blue Sapphire, 14k Gold, Platinum

Art Deco 2.15 Ct No Heat Blue Sapphire and Old Mine Cut Diamond Five-Stone Ring
Located in Napoli, IT
resize head is 9 mm. x 15 mm. Metal: 18 Kt yellow gold and platinum Hallmarks: assay (for both) Gems: 1
Category

1920s Art Deco Antique Platinum Hallmarks

Materials

Diamond, Blue Sapphire, 18k Gold, Platinum

Art Nouveau .50 Carat Diamond You and Me Ring
Located in Napoli, IT
yellow gold and platinum Hallmarks: assay Gems: 2 old cut Diamonds totalling approx .40 Ct (G/VVS) – 9
Category

Early 1900s Art Nouveau Antique Platinum Hallmarks

Materials

Diamond, 14k Gold, Silver

Superb Art Deco Emerald and Diamond Bow Ring
Located in Napoli, IT
Below Metal: 18 Kt yellow gold and platinum Hallmarks: assay for both and maker Gems: 1 emerald faceted
Category

1920s Art Deco Antique Platinum Hallmarks

Materials

Diamond, Emerald, 18k Gold, Platinum

Art Deco Certified Burma No Heat Pink Sapphire Diamond Plat 18 Karat Ring
Located in Napoli, IT
to age and use Further Details Below Metal: 18 Kt gold and platinum Hallmarks: assay for both Gems
Category

1920s Art Deco Antique Platinum Hallmarks

Materials

Diamond, Pink Sapphire, 18k Gold, Platinum

Exquisite 1.20 Carat Old Mine Diamond Plus Natural Pearl Pendant 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 Edwardian Antique Platinum Hallmarks

Materials

Diamond, 18k Gold, Platinum

Antique Edwardian circa 1910, 3.96 Carat Diamond and Natural Pearl Bracelet
Located in Berlin, Berlin
resp. 18k Platinum HALLMARKS Clasp with fineness mark "750" and further illegible mark DIMENSIONS
Category

1910s German Edwardian Antique Platinum Hallmarks

Materials

Diamond, Natural Pearl, Oriental Pearl, 18k Gold, Platinum

Edwardian French 1.70 VVS Diamond 2.30 Carat Natural Sapphire Twist Ring
Located in Napoli, IT
1905 ca – bearing French hallmarks The beautiful mounting is of exquisite crafting, 18 KT Rose gold and
Category

Early 1900s French Edwardian Antique Platinum Hallmarks

Materials

Diamond, Sapphire, 18k Gold, Platinum

Art Deco Diamond Platinum Brooch
Located in Berlin, DE
in platinum. Millegrain setting. Hallmarked with eagle's head for France. On the clasp number 197
Category

Early 20th Century Art Deco Antique Platinum Hallmarks

Materials

Diamond, Platinum

Art Deco Diamond Platinum Bracelet
Located in Sunny Isles Beach, FL
Art Deco Diamond and Platinum Bracelet. The bracelet has French assay hallmarks for platinum, 50.00
Category

Early 20th Century French Art Deco Antique Platinum Hallmarks

Materials

Diamond, Platinum

Edwardian 1.00 Carat Diamond Platinum Panel Ring
Located in Napoli, IT
life Further Details Below Metal: platinum, tested Hallmarks: present but worn Gems: 3 old mine cut
Category

Early 1900s Edwardian Antique Platinum Hallmarks

Materials

Diamond, Platinum

Edwardian Opal Diamond Cluster Ring On Platinum
Located in PARIS, FR
Cluster ring composed of a delicate platinum mounting (hallmark: mascaron), which is adorned in its
Category

1910s Edwardian Antique Platinum Hallmarks

Materials

Diamond, Opal, Platinum

4.20 Carat Diamond Solitaire Plus Platinum Ring
Located in Napoli, IT
Magnificent large Diamond solitaire ring Crafted in Platinum - not marked Semplicity in design to
Category

Early 1900s Edwardian Antique Platinum Hallmarks

Materials

Diamond, Platinum

Art Deco lapis lazuli ring in platinum
Located in PARIS, FR
ring, circa 1930.  Mascaron hallmark (French State hallmark for platinum) and PT hallmark. Finger
Category

1920s French Art Deco Antique Platinum Hallmarks

Materials

Lapis Lazuli, Platinum

Platinum and Diamonds French Art Déco Ring
Located in Saint-Ouen, FR
A lovely ring, made in France circa 1925. Made in Platinum (dog head hallmark) and set with
Category

1920s French Art Deco Antique Platinum Hallmarks

Materials

Diamond, Platinum

Art Deco French Ruby Diamond Platinum Ring
Located in Perth, AU
platinum, stamped with French hallmark, dog's head, to outer band. Currently size P 1/2 (US=7 3/4) and will
Category

1920s French Art Deco Antique Platinum Hallmarks

Materials

Diamond, Ruby, Platinum

Art Deco Era Diamond Platinum Cocktail Ring
Located in Los Angeles, CA
underside of the band is stamped with a single French hallmark for imported platinum.
Category

1920s Unknown Art Deco Antique Platinum Hallmarks

Materials

Diamond, Platinum

Platinum and 1.50 Carat Diamonds French 1920s Ring
Located in Saint-Ouen, FR
diamonds. Hallmark for platinum: The old man. The diamonds weights 1.50 carats total estimate. I/J color
Category

1920s French Antique Platinum Hallmarks

Materials

Diamond, Platinum

Belle Époque Platinum and Diamond Bow Hair Clip
Located in London, GB
Very chique hair clip in the shape of a bow, platinum set with diamonds French hallmark France
Category

Early 1900s French Belle Époque Antique Platinum Hallmarks

Materials

Diamond, Platinum

Belle Époque 2.40 Carat Diamond Platinum Negligee Necklace
Located in Napoli, IT
: platinum, tested Hallmarks: none/worn Gems: 1 old European cut diamond of approx .30 Ct (G/VVS) – 22 old
Category

Early 1900s Belle Époque Antique Platinum Hallmarks

Materials

Diamond, Platinum

Edwardian 13.95 Carat Diamond Platinum Rare Statement Necklace
Located in Napoli, IT
greatest price! Metal: Platinum, tested Hallmarks: none/worn Gems: 1 old European cut diamond of approx
Category

Early 1900s Edwardian Antique Platinum Hallmarks

Materials

Diamond, Platinum

Art Deco 2.15 Carat Diamond Large Platinum Cross
Located in Napoli, IT
PLATINUM – 1920 ca Large in size being 63 mm. x 40 mm. Along the fine design hand pierced and carved, are
Category

1920s Art Deco Antique Platinum Hallmarks

Materials

Diamond, Platinum

Platinum and 18 Carats Diamonds French Antique Bracelet
Located in Saint-Ouen, FR
clarity. The bracelet has a good sparkle. Dog head hallmarks for platinum, in a Chaumet boxe. The boxe
Category

1920s Art Deco Antique Platinum Hallmarks

Materials

Diamond, Platinum

2.10 Cushion Cut Diamond Platinum Target Ring
Located in Napoli, IT
A terrific ring! Metal: platinum, tested Hallmarks: none/worn Gems: 1 old mine cushion cut diamond
Category

1920s Italian Art Deco Antique Platinum Hallmarks

Materials

Diamond, Blue Sapphire, Platinum

1920s French Art Deco Ruby Diamond Platinum Cufflinks, Paris
Located in St. Catharines, ON
Of classic French "style constellation" design, each domed platinum link set with a central
Category

1920s French Belle Époque Antique Platinum Hallmarks

Materials

Diamond, Ruby, Platinum

Art Deco 3.60 Carat Diamond Platinum Drop Earrings
Located in Napoli, IT
can wish for! Excellent condition Further Details Below Metal: platinum, tested Hallmarks: none
Category

1920s Art Deco Antique Platinum Hallmarks

Materials

Diamond, Platinum

Natural pearl and diamond tie pin in platinum
Located in PARIS, FR
, England, Liverpool.  Mascaron hallmark (French import hallmark for platinum). Dimensions: 7.7 cm Design
Category

1910s British Art Deco Antique Platinum Hallmarks

Materials

Diamond, Natural Pearl, Platinum

Art Deco Colombian Emerald Diamond Platinum Rare Ring
Located in Napoli, IT
jewellery. Excellent condition Metal: platinum, tested Hallmarks: none/worn Gems: 1 emerald cut natural
Category

1920s Art Deco Antique Platinum Hallmarks

Materials

Diamond, Emerald, Platinum

Edwardian Certified Natural Pearl Diamond Platinum Earrings
Located in Napoli, IT
Metal: platinum, tested - fasteners white gold Hallmarks: none/worn Gems: 2 natural (not nucleated
Category

Early 1900s Edwardian Antique Platinum Hallmarks

Materials

Diamond, Natural Pearl, 18k Gold, Platinum

Platinum and 12 Carats Diamonds French Art Deco Brooch
Located in Saint-Ouen, FR
white gold for the pin. French hallmarks for platinum: the dog head. Hallmark for gold 18k: the eagle
Category

1920s French Art Deco Antique Platinum Hallmarks

Materials

Diamond, Platinum

Platinum and 7 Carats Diamonds French Art Deco Brooch
Located in Saint-Ouen, FR
Vs2. French hallmarks for platinum and gold 18K: the dog head and eagle head. Dimension: 46 and 28mm
Category

1920s French Art Deco Antique Platinum Hallmarks

Materials

Diamond, Platinum

Rectangular Diamond Plus Engagement Platinum Belle Époque Ring
Located in Napoli, IT
: Platinum, tested Hallmarks: none/worn Gems: 1 antique rectangular faceted cut diamond 8.13 mm. x 7.12 mm
Category

Early 20th Century Belle Époque Antique Platinum Hallmarks

Materials

Diamond, Platinum

Belle Époque Colombian Emerald Diamond Rare Platinum Ring
Located in Napoli, IT
Below Metal: platinum, tested Hallmarks: none/worn Gems: 1 emerald cut natural Colombian emerald of
Category

1910s Belle Époque Antique Platinum Hallmarks

Materials

Diamond, Emerald, Platinum

Art Deco 4.50 Carat Diamond Cornucopia Platinum Earrings
Located in Napoli, IT
: platinum, tested Hallmarks: none/worn Gems: 28 early brilliant cut diamonds totalling approx 2.30 Ct (F/G
Category

1920s Art Deco Antique Platinum Hallmarks

Materials

Diamond, Platinum

Platinum Diamond and Emerald French Art Deco Ring
Located in Saint-Ouen, FR
A very lovely French Art deco ring, made circa 1925. Made and Platinum: dog head hallmark. The ring
Category

1920s French Art Deco Antique Platinum Hallmarks

Materials

Diamond, Emerald, Platinum

Art Deco 18K gold platinum diamond pearl ring
Located in Versailles, FR
on the diamonds. French owl hallmark for 18K gold and the French Mascaron hallmark for platinum on
Category

Early 20th Century French Art Deco Antique Platinum Hallmarks

Materials

Diamond, Pearl, 18k Gold, Platinum

Art Deco 1.66 Carat G VVS Diamond Platinum Ring
Located in Napoli, IT
Below Metal: platinum, tested Hallmarks: present but worn Gems: 1 early brilliant cut diamond of approx
Category

1920s Art Deco Antique Platinum Hallmarks

Materials

Diamond, Platinum

Diamond Sapphire Platinum 18 Karat Gold Rare Ring
Located in Napoli, IT
gold and platinum, tested Hallmarks: none/worn Gems: 2 old mine cut diamonds totalling approx .50 Ct (H
Category

1910s Edwardian Antique Platinum Hallmarks

Materials

Diamond, Blue Sapphire, 18k Gold, Platinum

Edwardian Burma Ruby and Diamond Five-Stone Platinum Ring
Located in Napoli, IT
of solid Platinum not marked during the very early ages of last century The eternal composition of
Category

Early 1900s Edwardian Antique Platinum Hallmarks

Materials

Diamond, Ruby, Platinum

Austrian Art Deco Diamond Sapphire Platinum Target Ring
Located in Munich, DE
This lovely flat target ring was crafted in platinum in the 1920s. It has a platinum stamp and an
Category

1910s Austrian Art Deco Antique Platinum Hallmarks

Materials

Diamond, Sapphire, Platinum

Early 20th Century Natural Pearl and Diamond Platinum Necklace
Located in Essex, GB
A truly special antique French necklace. This stunner, crafted entirely in platinum, features
Category

Early 20th Century French Antique Platinum Hallmarks

Materials

Diamond, Natural Pearl, Platinum

Art Deco 9.0 Carat Natural Aquamarine Diamond Platinum Bracelet
Located in Napoli, IT
next generations to come Further Details Below Metal: platinum, tested Hallmarks: none/worn Gems: 9
Category

1920s Art Deco Antique Platinum Hallmarks

Materials

Aquamarine, Diamond, Platinum

Extremely Fine Edwardian Natural Pearl Diamond Platinum Riviere Bracelet
Located in Napoli, IT
: platinum, tested Hallmarks: none/worn Gems: 7 natural (not nucleated) salt water pearls ranging in diameter
Category

Early 1900s Edwardian Antique Platinum Hallmarks

Materials

Diamond, Natural Pearl, Platinum

1930s French Art Deco Platinum 10.53 Carat Diamond Bracelet
Located in Brisbane City, Queensland
we have seen in our collections. Original Art Deco 1930's French Brilliant cut Diamond set Platinum
Category

Early 20th Century French Art Deco Antique Platinum Hallmarks

Materials

Diamond, Platinum

Art Deco Certified Burma Sapphire Diamond Trilogy Platinum Ring
Located in Napoli, IT
Further Details Below Metal: Platinum, tested Hallmarks: none/worn Gems: 1 cushion faceted cut natural
Category

1920s Art Deco Antique Platinum Hallmarks

Materials

Diamond, Sapphire, Platinum

Beautiful Edwardian Night and Day Platinum Rose Gold Earrings
Located in Napoli, IT
treasure box Further Details Below Metal: 18 Kt rose gold and platinum, tested Hallmarks: none/worn Gems
Category

Early 1900s Edwardian Antique Platinum Hallmarks

Materials

Diamond, Rose Gold, Platinum

Platinum and 5.50 Carats Diamonds French Art Deco Clip Brooch
Located in Saint-Ouen, FR
. French hallmarks for gold (eagle head), platinum(dog head). Hallmark of maker(Unknown). The diamonds are
Category

1920s French Art Deco Antique Platinum Hallmarks

Materials

Diamond, 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.