Crystal was colorless, purple, yellow, green and tobacco color, and so on. Glass
luster. Transparent and translucent. Hardness 7. Sexual brittle. Share 2.65. No
cleavage.fracture, but also good equality ridge chevron fracture. Amethyst is the
color of clear, yellow crystal and the crystal is weak tea dichroism. Crystal has
a strong luminescence of the phosphorescence. Crystal green belt placer gold in
long, short-wave ultraviolet radiation issued gray green fluorescence. A cat's
eye,old effects. In a piezoelectric crystal.