Inesite
Mineral Ca2Mn7Si10O28(OH)2·5H2O
About it
Pink to orange-pink fibrous sprays and blades from manganese mines, notably South Africa's Kalahari field and Hale Creek, California; may brown with long exposure.
- Type
- Mineral
- Group
- Silicate (inosilicate)
- Formula
- Ca2Mn7Si10O28(OH)2·5H2O
- Hardness (Mohs)
- 5.5–6
- Specific gravity
- 3–3.05
- Streak
- white
- Lustre
- vitreous (glassy), silky
- Crystal system
- Triclinic
- Colours
- pink, rose red, orange-pink
- Transparency
- transparent, translucent
- Cleavage and fracture
- perfect in one direction
Typical values: real specimens vary. For more, see mindat.org.