This rare opal pattern is unbelievable - What is it called?

15:22
Uncut gem black opal delivers a surprising result!

28:05
IT HAPPENED AGAIN - ROUGH OPAL TURNS HARLEQUIN PATTERN

13:46
Cutting Lightning Stones open | These Septarian Nodules rock!

8:03
Sacrificing an Agate for Science (Does it matter where you cut it?)

13:07
The dream OPAL comes true!

17:07
I cut $15,000 out of this rough opal. One of my best wins!

12:15
making unique design silver ring - handmade silver carving jewelry

12:38