Tanzanite

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Tanzanite – Overview

Intro

Tanzanite is prized for rich blue-violet colour and a modern single-origin story tied to Tanzania.

Overview

This starter entry positions tanzanite as a premium contemporary gem where pleochroism, heating, and wearability should all be explained carefully.

About

This starter entry positions tanzanite as a premium contemporary gem where pleochroism, heating, and wearability should all be explained carefully. Tanzanite is presented here as a structured gemstone record ready for linked buyer guides, research posts, and media galleries.

Key Properties

Mineral / materialZoisite
ChemistryCa2Al3(SiO4)(Si2O7)O(OH)
Crystal systemOrthorhombic
ColourBlue to violet with strong pleochroism
Refractive index1.691 – 1.7
Birefringence0.008 – 0.013
Specific gravity3.35 – 3.38
Mohs hardness6 – 7
LusterVitreous
TransparencyTransparent to translucent
ToughnessFair to good