Antique Blue John Sterling Silver Necklace Pendant Art Deco Cabochon Oval 1920s Bleu Jaune Womens Mens Rare Gemstone Jewelry Jewellery art deco earrings The item isn't stamped but

The item isn't stamped but tests as explained

DESCRIPTION: A genuine antique solid 9ct 375 yellow gold chain necklace

The opal is lab created and has beautiful green

DESCRIPTION: A petite vintage solid 18ct 750 gold diamond pendant

The beads graduate in size and sing with beautiful brown

Antique Blue John Sterling Silver Necklace Pendant Art Deco Cabochon Oval 1920s Bleu Jaune Womens Mens Rare Gemstone Jewelry Jewellery art deco earrings The item isn't stamped butDESCRIPTION: A petite antique art deco (c1920s) solid silver and genuine blue john mineral necklace pendant. The pendant is stamped "SILVER" on the rear. It weighs approx. 2. 47g and 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. The surface of the blue john has some natural fissures in it.