Tungstite
A variety of Minerals
What is Tungstite?
Tungstite is a hydrous tungsten oxide mineral with formula: WO3·H2O. It is a secondary mineral formed by the weathering of other tungsten containing minerals. It crystallizes in the orthorhombic system in translucent yellow to yellow green masses. It is clay-like with Mohs hardness of 2.5 and a specific gravity of 5.5. It was first described in 1868 for an occurrence near Trumbull, Connecticut at the Hubbard Tungsten Mine at Long Hill.
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Quick Facts
Physical Properties
- Color
- Yellow, yellow-green, golden-yellow; yellow in transmitted light
- Hardness (Mohs)
- 2.5
Chemical Properties
- Chemical Formula
- WO3 · H2O
- Elements
- H, O, W
Also Known As
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