18.30 cts calibrated Koroit oval boulder opal -well polished [BMB2332]

BOULDER OPAL

This is a boulder stone that has been well polished. This stone has been cut to a standard size so it will fit into existing standard settings with out the need to customizing the mountings

 It was mined in Koroit Queensland.

 It is a stunning piece showing unique pattern

The weights and sizes are approximate.

There is some reflection from the artificial lights on the stone.
In some of the stones the sandstone may undercut the ironstone so it would have been stabilized to prevent this.