Anatase In Quartz Classification
Anatase In Quartz
Colorless With Orange Brown, Brown, Pale Yellow, Black, Green, Liliac, Gray Inclusions
Refractive index, appearance, birefringence, optic character and optic figure. A bull's-eye optic figure is determinative for quartz; may also show Airy's spiral optic figure and Brazil-law twinning under crossed polarizing filters.
Anatase is a polymorph of rutile and brookite.