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 / material | Zoisite |
|---|---|
| Chemistry | Ca2Al3(SiO4)(Si2O7)O(OH) |
| Crystal system | Orthorhombic |
| Colour | Blue to violet with strong pleochroism |
| Refractive index | 1.691 – 1.7 |
| Birefringence | 0.008 – 0.013 |
| Specific gravity | 3.35 – 3.38 |
| Mohs hardness | 6 – 7 |
| Luster | Vitreous |
| Transparency | Transparent to translucent |
| Toughness | Fair to good |