Antique 9ct Gold Blue Topaz Ring Solid 9k 9kt Rose Swiss Solitaire 1920s Vintage Womens Jewelry Jewellery crafts necklace The ring is stamped "18CT

The ring is stamped "18CT PLAT SET"

The item isn't stamped/hallmarked but tests for solid 15ct gold

it has two thick sheets of solid 9ct gold on each side

As to be expected to with the items age it isn't stamped/hallmarked

The ring isn't stamped/hallmarked which is a great sign of age

Antique 9ct Gold Blue Topaz Ring Solid 9k 9kt Rose Swiss Solitaire 1920s Vintage Womens Jewelry Jewellery crafts necklace The ring is stamped "18CTDESCRIPTION: A sweet antique art deco 9ct rose gold ring, adorned with a Swiss blue topaz (100% tested). The ring is stamped "9ct" on the inside of the shank. It measures approx. UK M. 5 or US 6. 5 and weighs approx. 0. 98g. The gemstone has a slightly rubbed face as to be expected with age and use and the claws are a little offset, see pictures video.