Opal Pendant Necklace Boulder & Lightning Ridge Opal Sterling Silver Opal Pendant & Chain Opal Necklace UK Opal Jewellery Sterling Silver Opal Pendant & Chain Opal Necklace Opal Gift UK Commute Round Stainless Steel Gold Plated Opal Pendant Necklace In Bulk Opal Pendant Etsy. 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)