Madagascar Green Dendritic Opal 6mm Round - 15-16 Inch Hematite It is known for its

It is known for its colors -- dark green and mustardy yellow

a variety of Jasper containing variably colored spherical patterns

with inclusions that appear in patterns similar to moss or lichen

and the sheets and flakes of mica are flexible

Madagascar Green Dendritic Opal 6mm Round - 15-16 Inch Hematite It is known for itsThis 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.