Difference between revisions of "Zoisite"

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[[Image:Zoisite-ruby.JPG|left|framed|Zoisite with ruby bead]]<br clear="left" />

Latest revision as of 09:10, 11 December 2006

Chemical composition Calcium aluminum silicate
Crystal system Orthorhombic
Habit Prismatic and massive
Cleavage Perfect, prismatic
Fracture Uneven
Hardness 6.5
Optic nature Biaxial +
Refractive index 1.685-1.707
Birefringence 0.008
Dispersion Low, 0.012
Specific gravity 3.35
Lustre Vitreous
Pleochroism Strong in blue
Zoisite with ruby bead