Mineral Name: Zoisite •Chemical Composition: Ca2Al3(SiO4)3(OH), •Calcium Aluminum Silicate Hydroxide. •Class: Silicates •Subclass: Sorosilicates •Group: Epidote •Crystal system: orthorhombic •Color: various shades of blue to lavender, •deeper along the crystal axis. •Refractive Index: 1.68 - 1.72 •Hardness: 6.5-7 •Clevage: perfect in one direction
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