Mohs Hardness: 7 out of 10
Color: Semi-transparent to translucent pink. Often cloudy and fractured.
RI: 1.544 to 1.553 (very constant)
SR/DR/AGG: DR to AGG (if highly fractured and semi-translucent
Optic Character: Uniaxial positive. Might show a bull's eye or Airy's spiral optic figure and Brazil law twinning under crossed polarizing filters.
Pleochroism: Very weak. Different tones of body color
Spectrum: Not diagnostic
Fluorescence: Inert to weak purple under SW
SG: 2.66 (+0.03 / -0.02)