Antique Blue John Sterling Silver Earrings Rare Art Deco Cabochon Screw Back 1920s Bleu Jaune Womens Vintage 925 Gemstone Jewelry Jewellery genuine charles It has the picture retaining

It has the picture retaining shims for both sides

maybe Norwegian judging from the items design

The pendant isn't stamped/hallmarked which is typical of this type of antique jewellery

The item has a small perforation in the face and dark patina on the rear

dating to 1999

Antique Blue John Sterling Silver Earrings Rare Art Deco Cabochon Screw Back 1920s Bleu Jaune Womens Vintage 925 Gemstone Jewelry Jewellery genuine charles It has the picture retainingDESCRIPTION: 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 BRITISH MAKE" and the screws open close well. They weigh a combined total of approx. 6. 79g and the size dimensions are in the later photos.