Up for sale is a stunning, authentic antique Art Deco period open filigree ring mounting. This empty semi-mount is crafted from a premium vintage platinum alloy and features exceptional, intricate openwork heart and floral motifs with a vacant center intricate geometric openwork details typical of the 1920s–1930s era.
This ring is a perfect restoration piece for a jeweler, bench goldsmith, or vintage collector looking to set their own old European cut diamond, sapphire, or colorful gemstone.
Item Specifications:
- Metal: Platinum Alloy (90% Pure Platinum / 10% Iridium)
- Hallmark / Stamped: Stamped "CERTIFIED 10%IRID-PLAT" inside the inner band
- Total Weight: 3.16 Grams (Tested on calibrated jewelry scale)
- Style: Antique Ornate Filigree / Art Deco Semi-Mount
- Setting Type: Empty Center Basket (Ready for prong or bezel setting)
- Current Ring Size: Size 6
- Center stone opening Aprox 5.74 mm
"CERTIFIED 10% IRID PLAT".
Breakdown of the Hallmark
- 10% IRID PLAT: This is a classic vintage hallmark verifying that the metal composition is a high-grade premium alloy consisting of 90% pure platinum and 10% iridium. Adding iridium gives the platinum excellent hardness and durability, which allowed jewelers during the Art Deco era to craft incredibly fine, lace-like filigree work without compromising the ring's structural integrity. [1, 2, 3]
- CERTIFIED: This was a quality assurance mark used by certain high-end manufacturers or trade associations during the early-to-mid 20th century to guarantee that the metal purity met strict legal standards.