Madagascar Green Dendritic Opal 8mm Round - 15-16 Inch 9mm The presence of Manganese within

The presence of Manganese within the stone produces the purple hue

veins and brecciated patterns

known as "azure

having been worn by shamans

Dumortierite is an aluminum borosilicate mineral that varies in color from blue

Madagascar Green Dendritic Opal 8mm Round - 15-16 Inch 9mm The presence of Manganese withinThis 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.