Brilliant Oyster Turquoise Pendant, Natural Oyster, 925 sterling silver jewellery, Handmade jewellery, Gift for her, Favourite pendant. About Gemstone; The oyster turquoise is made with real shell from the spiny oyster, which is combined with turquoise to create the beautiful unique patterns. Andean people used spondylus shell as complete shells in rituals, cut into pieces and used as inlay in jewelry, and ground into powder and used as architectural decoration. can be found in a variety of shad