Australian Opal Ring, Doublet, 925 Sterling Silver, Size 7.5Opal Doublet Ring, 925 Sterling Silver Doublet Opals are great value as you have a fairly thick layer of Opal generally 1 2 mm thick and this gives the colors a nicer depth and play of light. All of this range have strong colour flashes and this is no exception. The greens and reds really jump out at you. The gemstone has been bezel set in bright 925 Sterling Silver with an open back. The opal slice has been bonded to another slice of Ironstone, an