Australian Koroit Boulder Opal cab from an old collection.
Koroit Boulder Opal is a unique and sought-after variety of opal found in the Koroit opal fields in Queensland, Australia. It is highly valued for its stunning patterns and colors, making it a popular choice for collectors and artists alike.
37.750 carats / 37 x 27 x 5 mm
Estimated Value: $225 - $235
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