ZOISITE
Species: Zoisite
Mohs Hardness: 6 to 7 out of 10 Color: Light to dark green, yellowish green, grayish green. RI: 1.691 to 1.700 (+/-0.005) Birefringence: 0.008 to 0.013 SR/DR/AGG: DR Optic Character: Biaxial positive Pleochroism: Strong. Varies by color. Spectrum: Varies, not diagnostic. Fluorescence: Generally inert SG: 3.35 (+0.10 / -0.25) Routine Treatments: Heating |