Madagascar Green Dendritic Opal 6mm Round - 15-16 Inch R1180 These inclusions range broadly in

These inclusions range broadly in type and color and produce patterns that can look like gardens

red and yellow-orange

Enjoy these rare and exotic stones in their natural form

limestone and copper

where the stones are thought to have been originally found

Madagascar Green Dendritic Opal 6mm Round - 15-16 Inch R1180 These inclusions range broadly inThis 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.