Art Deco, platinum, green sapphire and diamond three stone ringThis ring is sold, sorry. See similar rings: Metal: platinum rings Gems: sapphire rings, diamond rings Type of ring: Art Deco rings, three stone rings Colour: green rings Green sapphire and diamond ring, circa 1925. In addition to their famous blue variety, sapphires come in a huge variety of different colours, depending on their chemical impurities. The sapphire at the centre of this ring is a silvery, sage green an unusual shade, which, coupled with