Tungstite
Mineral WO3·H2O
Also called Tungstic ochre
About it
Soft, bright yellow to yellow-green powdery coatings on weathered wolframite and scheelite. A handy field sign of tungsten ore nearby; rarely seen as tiny platy crystals.
- Type
- Mineral
- Group
- Oxide (hydrated)
- Formula
- WO3·H2O
- Hardness (Mohs)
- 2.5
- Specific gravity
- 5.5
- Streak
- yellow
- Lustre
- earthy, dull
- Crystal system
- Orthorhombic
- Colours
- yellow, yellow-green
- Transparency
- translucent, opaque
- Cleavage and fracture
- perfect basal
Typical values: real specimens vary. For more, see mindat.org.