Opal

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Product Description

Opal is a gem-quality form of hydrated amorphous silicon dioxide. Its name is derived from the Sanskrit word for ‘stone’. It is gemologically classed as a mineraloid rather than a mineral, owing to its amorphous form. Opal is considered to be the national gemstone for Australia, owing to the fact that Australia produces roughly 97% of the world’s entire supply of opal gemstones. Opals can be divided into three main subgroups: precious opal, fire opal and common opal (potch).

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