Diopside (chrome)

Color: Chrome green to colorless.

Moh’s Hardness: 5-6

Refractive Index: 1.671-1.726

Critical Angle: 36.78°

Specific Gravity: 3.27-3.31

Cleavage: Perfect

Fracture: Uneven

Heat Sensitivity: Yes in my experience

Dichroic: weak

Birefringence (double refraction): Medium (.028)

Crystal Structure: Monoclinic

Treatments: Generally none