Sagenitic Quartz Classification
Colorless Quartz With Various Colored Inclusions
Sagenite, Cupid's Darts, Fleches D'amour, Venus Hair Stone, Thetis Hair Stone And Cat's Fur Quartz
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.
Colorless quartz with visible needle-like inclusions is a variety called "sagenitic." Stones with red hematite inclusions or "beetles-legs" may take a reddish appearance and be called "strawberry quartz." If colorless quartz contains golden blades of rutile it is often called "rutilated quartz."