Madagascar Green Dendritic Opal 6mm Round - 15-16 Inch R1180 limestone and copper

limestone and copper

Sweet and soft pink

and forms within a host rock such as ironstone or sandstone

The most common members of the feldspar group are the plagioclase feldspars and the alkali feldspars

It is frequently fluorescent under ultraviolet light

Madagascar Green Dendritic Opal 6mm Round - 15-16 Inch R1180 limestone and copperThis variety of opal is named "dendritic" for the small inclusions within it that resemble moss or ferns. These inclusions consist of iron, manganese and other metallic oxides captured during the forming of the rock. Opals are hydrated amorphous forms of silica, created when silica hardens within the fissures of other stones.