Optical Properties of Jadeite

Gladstone-Dale:	CI meas= 0.028 (Excellent) - where the CI = (1-KPDmeas/KC) CI calc= 0.054 (Good) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1979,KPDmeas= 0.2033,KC= 0.2092
Optical Data:	Biaxial (+), a=1.654-1.673, b=1.659-1.679, g=1.667-1.693, bire=0.0130-0.0200, 2V(Calc)=68-78, 2V(Meas)=70-80. Dispersion r <>
Pleochroism (x):	colorless or green.
Pleochroism (y):	colorless or yellowish green.
Pleochroism (z):	colorless or yellow.