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.

Additional recommended knowledge

How to quickly check pipettes?

Essential Laboratory Skills Guide

Daily Visual Balance Check

It was first described in 1868 for an occurrence near Trumbull, Connecticut.

References

• Mindat with location data
• Webmineral