Dendritic Opal, Rough Rock, per lb Rose Quartz and the copper forms solidify

and the copper forms solidify in the cool water

13 mm thick

5" - 1" in size

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

and examples of individual pieces

Dendritic Opal, Rough Rock, per lb Rose Quartz and the copper forms solidifyFrom 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