18.1ct Koroit Opal on chocolate banded ironstone conglomerate

18.1ct Koroit Opal on chocolate banded ironstone conglomerate
Rainbow colour play with red, blue, pink & green.
Dimensions: 18.5 x 16.2 x 6.5mm. Dimensions approximate due to the shape of the opal.
$$20 AUD. Free Shipping within Australia on purchases over $100. Insurance can be arranged at buyer’s expense. Please check if import tax applies in your country.