Antique Blue John Sterling Silver Earrings Rare Art Deco Cabochon Screw Back 1920s Bleu Jaune Womens Vintage 925 Gemstone Jewelry Jewellery albert fob The item is stamped with

The item is stamped with a makers mark which looks like Robert Allison's

The item is stamped but the stamps have worn

dating to 1988

The item does click shut but there is some play in it and a large gap on one side

The item has a slight gold hue as it would've originally has a gold vermeil finish over the silver

Antique Blue John Sterling Silver Earrings Rare Art Deco Cabochon Screw Back 1920s Bleu Jaune Womens Vintage 925 Gemstone Jewelry Jewellery albert fob The item is stamped withDESCRIPTION: A rare pair of antique art deco (c1920s) sterling silver and genuine blue john earrings. Blue john is an extremely rare mineral and can only be found in Derbyshire in the UK (not far from me), it is in fact Britain's rarest mineral. The earrings are stamped "SILVER" and the screws open close well. They weigh a combined total of approx. 4. 07g and the size dimensions are in the later photos.