gemstone
Tanzanite
Zoisite (Ca2Al3(SiO4)(Si2O7)O(OH))
AI-generated identification · may be incorrectHardness of 6-7 on Mohs scale, pleochroic blue-violet color, vitreous luster, orthorhombic crystal system, and distinct cleavage.
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Physical properties
Hardness of 6-7 on Mohs scale, pleochroic blue-violet color, vitreous luster, orthorhombic crystal system, and distinct cleavage.
Formation & geological history
Forms in metamorphic environments under high pressure and low temperature conditions, often associated with tectonic activity.
Uses & applications
Primarily used as a precious gemstone in fine jewelry, rings, and pendants.
Geological facts
Exclusively found in one small mining area near the Merelani Hills in Northern Tanzania, making it extremely rare.
Field identification & locations
Identified by its striking trichroism (showing blue, violet, and brownish-red depending on the viewing angle) and high market demand.
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