Australian Doublet Opal Necklace

Opal gemstone is 12 mm x 9 mm, with incredible natural vibrant cobalt blue color. A doublet opal is not a solid opal. Doublets are made of thin slices of fine quality opal (generally light opal) glued to a backing piece of black potch, glass or Queensland ironstone, thus resembling natural black opal or Queensland boulder opal. Moonstone gemstones wrapped into the clasp are 5 mm rounds. Necklace is finished in sterling silver with a cable chain and spring clasp.   Total length 18 inches (46 cm.)