Madagascar Green Dendritic Opal 8mm Round - 15-16 Inch faceted_coins The proper name for Rosewood

The proper name for Rosewood is Petersianthus quadrialatus

occuring 10

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

also known as Nacre

forming Tektite

Madagascar Green Dendritic Opal 8mm Round - 15-16 Inch faceted_coins The proper name for RosewoodThis 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.