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Carcoar is a historic town in the Central West region of New South Wales, Australia, in Blayney Shire.
Agate is a cryptocrystalline variety of silica, characterised by its fineness of grain and brightness of colour.
The Opal is the national gemstone of Australia - and the Australian Black Opal is the most valuable and widely known type of opal.
Boulder Opal is unique to western Queensland, Australia.