Vintage Blue John Sterling Silver Necklace Pendant Square 1981 Hallmarked Solid 925 Border Bleu Jaune Womens Rare Gemstone Retro Jewelry vintage cultured The shank has some bumps

The shank has some bumps in areas

53g and the size dimensions are in the later photos

All marcasites are present

PLEASE NOTE: The front (St Christopher side) has worn with age and use

DESCRIPTION: A brilliant rare antique 1920s solid silver tie clip

Vintage Blue John Sterling Silver Necklace Pendant Square 1981 Hallmarked Solid 925 Border Bleu Jaune Womens Rare Gemstone Retro Jewelry vintage cultured The shank has some bumpsDESCRIPTION: A vintage sterling silver and genuine blue john necklace pendant. The pendant is hallmarked for sterling silver, dating to 1981. It weighs 1. 71g 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.