Vintage 9ct Gold Blue John Ring Solid 9k 9kt 375 Yellow Signet Cabochon Oval Fluorite Bleu Jaune Womens Rare Gemstone Jewelry Jewellery wave link The item is stamped "STERLING

The item is stamped "STERLING SILVER" for silver

35g and is approx

it just has some play in it when open

The ring isn't stamped/hallmarked

It clicks shut and is stamped "9ct"

Vintage 9ct Gold Blue John Ring Solid 9k 9kt 375 Yellow Signet Cabochon Oval Fluorite Bleu Jaune Womens Rare Gemstone Jewelry Jewellery wave link The item is stamped "STERLINGDESCRIPTION: A lovely vintage solid 9ct gold genuine blue john ring. Blue john is an extremely rare mineral and can only be found in Derbyshire in the UK, it's in fact Britain's rarest mineral. The ring sizes at approx. UK O. 5 or US 7. 25 and weighs approx. 1. 81g. It's fully hallmarked for 9ct gold, dating to 1988.