Vauquelinite
Mineral Pb2Cu(CrO4)(PO4)(OH)
Take care.
- Contains lead: Wash your hands after handling it, keep it away from children, and don't make dust.
- Toxic: Wash your hands after handling it, don't lick or taste it, and don't make dust.
About it
Small olive-green to brown crystals and crusts that usually grow with crocoite, as at Berezovsk in the Urals of Russia. Named for Louis Vauquelin, who discovered chromium.
- Type
- Mineral
- Group
- Chromate, chromate-phosphate
- Formula
- Pb2Cu(CrO4)(PO4)(OH)
- Hardness (Mohs)
- 2.5–3
- Specific gravity
- 5.9–6.1
- Streak
- greenish
- Lustre
- adamantine (diamond-like), resinous
- Crystal system
- Monoclinic
- Colours
- olive green, brown, blackish green
- Transparency
- translucent, opaque
- Cleavage and fracture
- none obvious; irregular fracture
Typical values: real specimens vary. For more, see mindat.org.