Tanzanite Physical Properties
Tanzanite Physical Properties loose sale price & Tanzanite Gemstone Information

  • 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