Vintage 1930s Blue Turquoise Glass Marcasite Silver RingVintage 1930s dress ring, featuring a smooth round turquoise coloured glass stone surrounded by marcasite stones. The ring is set in sterling silver. Marcasites are Pyrite also known as Fools Gold. It was used in jewellery due to it's ability to catch the light, giving a diamond effect. ERA 1930s HALLMARKS Silver MEASUREMENTS The face of the ring measures 1. 1cm 0. 4" in diameter and 0. 8cm 0. 3" in height. RING SIZE 18. 5mm UK Q 1 2 US 8 1 2 WEIGHT