Not the best, but a pretty stone from Lightning Ridge, Australia.
Look at its size, a great deal for a collectable black opal, datk body tone, popular pinfire pattern, great shape and dome ... Beautiful black opal loose stone with brilliant blue colour for only a little price.
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.