Second to sapphires, topaz is the most common and widespread gemstone found in Tasmania. It has a very strong association with Devonian granites in northern and western Tasmania, but can be found in other rock types. Flinders Island, the Blue Tier area and the Gladstone area are the most important occurrences, but topaz is also known from plenty of other localities, such as Bicheno, Coles Bay, the Stanley River, Moina and Mount Bischoff.