Koroit boulder Opal

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Multicoloured ironstone with purple opal patterns

Australian Opal

A slice of Koroit boulder with amazing ironstone and opal patterns. Polished both sides. A lovely piece for a collection, or simply use as decorative paperweight. I am listing 3 other slices as well, from the same piece of boulder.  Price is for this piece only. Weighs 63 grams, measures 85mm x 40mm x 9mm at longest, widest and deepest points.