Angara Natural Opal Necklace Prong Set Round Opal Pendant Necklace Sterling Silver Opal Pendant & Chain Opal Necklace Opal Gift UK Sterling Silver Opal Pendant & Chain Opal Necklace Opal Gift UK 9ct Yellow Gold Solid White Opal Round Ornate Pendant on Gold Chain. Includes: A matching box. Style: Minimalist Material: 925 sterling silver, platinum plated, opal Care: Avoid wearing during exercise, as sweat will react with the jewelry to produce silver chloride and copper sulfide, which causes the jewelry to deteriorate and corrode over time. Imported Gemstone origin: Australia Product measurements: Chain length: 15. 7 in Extension chain length: 2 in Weight: 0. 06 oz (1. 7 g)