This opal is from Koroit, central Queensland (map). These stones have a fantastic polish on them and are left free form shape. The opal colour is very bright and very vivid.
Koroit opal is famous for it’s unique patterns and beautiful flashing colours formed inside the ironstone.
Opal Body Tone Scale as per recommendation by the Australian Opal and Gem Industry Association Ltd.
1 Faint, 2 Dull, 3 Bright, 4 Very Bright, 5 Brilliant - Gem Quality
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