DDO118c Dendritic Opal Cabochon Rectangle one of the original minerals

one of the original minerals mistaken for gold during the big gold rush

This small nodule could have been part of a larger piece

It shows horizontal banding in translucent to off-white and golden orange calcite

This specimen features red-orange and lavendar agate with yellow-green moss inclusions and an open quartz center

DDO118c Dendritic Opal Cabochon Rectangle one of the original mineralsThis polished cabochon is made from Turkish Dendritic Opal, and shows translucent and opaque white chalcedony with black dendrites. 29mm x 33mm Dendritic Opal is technically a form of agate (microcrystalline silica) rather than a type of opal (microscopic silica with no crystalline structure). Since it typically displays opaque chalcedony rather than translucent, this name distinguishes it from other Dendritic Agates that have significantly different