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

red and yellow-orange

It is frequently fluorescent under ultraviolet light

where the stones are thought to have been originally found

Enjoy these rare and exotic stones in their natural form

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.