Australian 18cts - Solid Tribal Pattern Koroit Black Boulder Opal 30+ Yr Old investment opal Dimensions of stone: 72mm x

Dimensions of stone: 72mm x 32mm x 15mm

Cut to a freeform oval cabochon with a high quality finishing polish

Area of Mine - South Australian Opal Fields

these geological wonders tell a story millions of years in the making—and not a single page can be missing

This stone displays deep blue and green colouration contrasting with beautiful tan earth tones in transparent crystal opal

Australian 18cts - Solid Tribal Pattern Koroit Black Boulder Opal 30+ Yr Old investment opal Dimensions of stone: 72mm xThis High quality solid boulder opal displays beautiful electric greens, blue and yellow flashes on very desirable black, chocolate ironstone Cut to a freeform shape. Perfect for jewellery creations or to add to your collection. From the elusive mine in Koroit, featured on the Discovery Channel Total weight 18cts Area of Mine Koroit, Outback Queensland, Australia Dimensions 25mm x 13mm x 5mm Formation Koroit nut Shape freeform Colours green, blue,