Look at its pattern, beautifully lined up showing large pin fire, the color is bright, showing strong green color and the shape is easy to set ( long oval ) so there's nothing to worry about. Grab this chance before you miss it out. Another lovely piece of black opal found at Lightning Ridge, NSW, Australia.
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.