Mohs Hardness: 3.5 to 4 out of 10
Color: Most ammolite is green and red, with blue and violet ammolite being more rare.
RI: 1.520 to 1.680 (varies with mineral content)
Birefringence: Usually 0.155
Optic Character: N/A
Spectrum: Not diagnostic
SG: Usually 2.70 (varies with mineral content)