Australian opals have a spectacle colour visual, which provides the gemstones an extreme and mysterious appearance known as opalescence. Australian Opal is a hardened gel of silica and water, usually contains 6 – 10%. Australian Opal is recognised as one of the first-class rage of opal gemstone found in the Australian Opal mines. Its physical quality varies with differences in its structure and water content. Australian Opals are considered as most luxurious and fashionable gemstones for jewellery purposes.