This Koroit Boulder Opal is a stunning piece with a deep green and blue colour, originating from Australia. The gemstone is rough in shape and opaque with ideal cut grade and opalescence effect. Measuring 20mm in length, 12mm in depth, and 9mm in width, this natural gemstone is perfect for any high level jewellery making project, either as a secondary addition or as a one off specialty centre piece. With no enhancements or modifications, this Australian rough boulder opal is a very beautiful and desirable addition to any gemstone collection.
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