DDO121c Dendritic Opal Cabochon Books and pink agate with open

and pink agate with open quartz center

They are believed to have formed in the negative spaces between large crystal blades of calcite or aragonite

8cm x 6cm x 3

Native Copper Slab

DDO121c Dendritic Opal Cabochon Books and pink agate with openThis polished cabochon is made from Turkish Dendritic Opal, and shows opaque milky chalcedony with black dendritic patterning. 26. 5mm x 37mm 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