Vintage Sterling Silver Blue John Necklace Pendant Small Hallmarked Cabochon Charm Border Bleu Jaune Womens Mens Rare Gemstone Retro Jewelry silver georg The metal on the earrings

The metal on the earrings is base metal which is typical of earrings of this type and era

The item is fully hallmarked

The earrings are stamped "375" on the stems and both backs are 9ct

The earrings are stamped "14K" on the screw and weigh a total of 2

It's stamped "9ct BK&FT" and the size dimensions are in the later photos

Vintage Sterling Silver Blue John Necklace Pendant Small Hallmarked Cabochon Charm Border Bleu Jaune Womens Mens Rare Gemstone Retro Jewelry silver georg The metal on the earringsDESCRIPTION: A petite vintage sterling silver and genuine blue john mineral necklace pendant charm. The pendant is fully hallmarked for sterling silver, dating to 1994. It weighs 2. 78g and is small in size, the size dimensions are in the later photos. 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.