gemstone
Tanzanite
Zoisite (Ca2Al3(SiO4)(Si2O7)O(OH))
AI-generated identification · may be incorrectHardness of 6 to 7 on the Mohs scale, pleochroic violet-blue color, vitreous luster, orthorhombic crystal system, and specific gravity around 3.35.
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Physical properties
Hardness of 6 to 7 on the Mohs scale, pleochroic violet-blue color, vitreous luster, orthorhombic crystal system, and specific gravity around 3.35.
Formation & geological history
Formed through complex metamorphic processes within Neoproterozoic orogenic belts, specifically dated to approximately 585 million years ago.
Uses & applications
Primarily utilized as a high-end gemstone in fine jewelry such as rings, necklaces, and earrings.
Geological facts
Tanzanite is found in only one place on Earth, near the Merelani Hills of Northern Tanzania, making it rarer than diamonds.
Field identification & locations
Identified by its distinctive trichroism showing blue, violet, and burgundy hues from different angles, exclusively sourced from the Merelani Hills.
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