Australian Opal Pendant, Doublet, 925 Sterling Silver, g1Opal Doublet Pendant, 925 Sterling Silver Doublet Opals are great value as you have a fairly thick layer of Opal generally 1 2 mm thick which gives the colors a nicer depth and play of light. All of this range have strong colour flashes and this is no exception. The gemstones have been bezel set in bright 925 Sterling Silver with an open back. The opal slice has been bonded to another slice of Ironstone, an iron rich form of Jasper, to add strength