Madagascar Green Dendritic Opal 6mm Round - 15-16 Inch R1180 where the stones are thought

where the stones are thought to have been originally found

Princess Patricia of Connaught

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

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

red and yellow-orange

Madagascar Green Dendritic Opal 6mm Round - 15-16 Inch R1180 where the stones are thoughtThis 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.