aNDALUSITE

Photo courtesy of High Life Living Luxury

Species:  Andalusite
Mohs Hardness:  6.5 to 7.5 out of 10
Color:  Black, white, gray, green, yellow, pink, brown and orange
RI:  1.634 to 1.643
Birefringence:  +/- 0.005
SR/DR/AGG:  DR
Clarity Type:  Type II
Pleochroism:  Strong, colors vary depending on gem's bodycolor
Spectrum:  Not diagnostic
Fluorescence:  Variable, not diagnostic
SG:  3.17

andalusite Facts

Andalusite occurs in many different colors.

Andalusite displays strong pleochroism which is often visible with the naked eye.