Mohs Hardness: 2 to 2.5 out of 10
Color: Transparent to opaque. Light yellow to dark brown, orange, red, green, black or white.
RI: 1.540 (+0.005 / -0.001)
SR/DR/AGG: SR, commonly with strong ADR
Fluorescence: Inert to strong yellowish green to orangy yellow, white, bluish white, or blue under LW. Weaker under SW.
SG: 1.08 (+ 0.02 / -0.08)