Huntite
Mineral CaMg3(CO3)4
About it
Chalky, porcelain-white masses and nodules in caves and weathered magnesite and dolomite, used as a fire-retardant filler. Named for American mineralogist Walter Hunt; first found at Currant Creek, Nevada.
- Type
- Mineral
- Group
- Carbonate
- Formula
- CaMg3(CO3)4
- Hardness (Mohs)
- 1–2
- Specific gravity
- 2.69–2.7
- Streak
- white
- Lustre
- earthy, dull
- Crystal system
- Trigonal
- Colours
- white
- Transparency
- opaque
- Cleavage and fracture
- none
Typical values: real specimens vary. For more, see mindat.org.