Madagascar Green Dendritic Opal 6mm Round - 15-16 Inch R1180 and forms within a host

and forms within a host rock such as ironstone or sandstone

Enjoy these rare and exotic stones in their natural form

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

Princess Patricia of Connaught

limestone and copper

Madagascar Green Dendritic Opal 6mm Round - 15-16 Inch R1180 and forms within a hostThis 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.