Vauxite
Mineral Fe2+Al2(PO4)2(OH)2·6H2O
About it
Small sky-blue to deep blue crystals and sprays from the tin mines of Llallagua in Bolivia, its main source. Named for Philadelphia collector George Vaux.
- Type
- Mineral
- Group
- Phosphate
- Formula
- Fe2+Al2(PO4)2(OH)2·6H2O
- Hardness (Mohs)
- 3.5
- Specific gravity
- 2.39–2.41
- Streak
- white
- Lustre
- vitreous (glassy)
- Crystal system
- Triclinic
- Colours
- sky blue, deep blue
- Transparency
- transparent, translucent
- Cleavage and fracture
- none; uneven fracture
Typical values: real specimens vary. For more, see mindat.org.