Vintage Blue John Sterling Silver Necklace Pendant Square 1981 Hallmarked Solid 925 Border Bleu Jaune Womens Rare Gemstone Retro Jewelry solid They weigh a combined total

Vintage Blue John Sterling Silver Necklace Pendant Square 1981 Hallmarked Solid 925 Border Bleu Jaune Womens Rare Gemstone Retro Jewelry solid They weigh a combined totalDESCRIPTION: A petite vintage sterling silver and genuine blue john necklace pendant. The pendant is stamped "SILVER" and with a makers mark. It weighs 1. 06g and the size dimensions are in the later photos. The blue john is very dark purple in colour, it looks almost black, see pictures video. Blue john is an extremely rare mineral and can only be found in Derbyshire in the UK (not far from me), it's in fact Britain's rarest mineral. Mountains of

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