Great proportion, quite nice and thick, showing multicolors in every angle. Guaranteed natural and definitely Australian !!
A large size like this black opal does not come around everyday, one of the collectable, high range in black opal.
The shape of opal. Our opal comes in Oval, Round, Teardrop, Square, Triangle and Free Shape.
Describes the arrangement of opal's play of colour. Please see Learn About Opal to understand more.
B1 is most desired and brightest to be seen, and B7 is most darkest / dullest of all.