KORIOT OPAL NUTS IN SANDSTONE ROUGH
This is a natural untreated rough opal from the Koriot opal field .On the opal field they call this conglomerate which i think is a bad name for a stunning stone.
This is a slab of rough material ready for finishing. You can cut into stones or leave as a specimen piece. This material of this quality is not easy to find. There are some holes in this material which is natural so you can polish as is or fill the holes in.
Best for advanced cutters to finish this beautiful material.
Photo taken wet.