Strawberry Quartz Classification
Colorless With Red 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.
The hematite included quartz from the Cumbria, England mine was called Scarlet quartz. Some stones have been incorrectly called lepidocrocite quartz because the hematite inclusions are often misidentified as lepidocrocite.