Antique Art Deco Solid Silver Hematite & Marcasite Ring Square Cut Geometric Ladies Vintage Womens Mens Jewelry Jewellery UK P.5 or US 7.75 emerald cluster The item is stamped with

The item is stamped with a foreign silver hallmark and also tests for high grade silver (800+)

It is stamped "9ct SIL"

complete with Swedish silver hallmarks

There are some chips to the edge of the Whitby jet and some dents on the rear

but it's not its an alloy of brass

Antique Art Deco Solid Silver Hematite & Marcasite Ring Square Cut Geometric Ladies Vintage Womens Mens Jewelry Jewellery UK P.5 or US 7.75 emerald cluster The item is stamped withDESCRIPTION: A genuine antique art deco (c1920s) solid silver ring, adorned with a square cut hematite gemstone and numerous marcasites. The ring has a foreign silver stamp on the shank and sizes at approx. UK P. 5 or US 7. 75. It weighs approx. 3. 48g and the size dimensions are in the latter photos.