Difference between revisions of "Zoisite"
From The Gemology Project
Africanuck (talk | contribs) |
Africanuck (talk | contribs) |
||
Line 1: | Line 1: | ||
{{Ziosite}} | {{Ziosite}} | ||
+ | [[Image:Zoisite-ruby.JPG|left|framed|Zoisite with ruby bead]]<br clear="left" /> |
Latest revision as of 09:10, 11 December 2006
Zoisite | |
---|---|
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 |