Dendritic Opal, Rough Rock, per lb Rose Quartz 13 mm thick

13 mm thick

and examples of individual pieces

These large black obsidian spheres are polished to a high shine and are very reflective

olive green

Dendritic Opal, Rough Rock, per lb Rose Quartz 13 mm thickFrom Turkey, featuring white rock with black dendritic inclusions. Size varies from 1 10 lb individual pieces. If you have a preference for material size, please indicate in your order notes. Images show the rock wet and dry, with two polished specimens as an example of a finished piece. Dendritic Opal is technically a form of agate (microcrystalline silica) rather than a type of opal (microscopic silica with no crystalline structure). Since it