Zoisite

The stone zoisite was named by A.G. Werner after the mineral collector Siegmund Freiherr Zois(1747 - 1819). The term zoisite aroused unpleasant associations in English (zoisite - suicide), whereupon the synonym tanzanite was created.

Zoisite occurs in Longido/Tanzania.

It has the colours grey to greenish, rarely intense green.


Mineral class of the group silicates
formula: Ca2Al3(O/OH/SiO4/Si2O7) + Ba,Cr,Fe,Mg,Mn,Sr,V

Mohs hardness: 6 - 6.5
Density: 3.25 - 3.36
cleavage: perfect, uneven fracture
Stroke colour: white
Transparency: opaque to translucent

Healing properties
Regeneration, constructiveness, promotes recovery after diseases and stresses