Bannisterite
A variety of Minerals
What is Bannisterite?
Bannisterite Market Value Calculator
Estimate the market value of Bannisterite using size, quality, and finish. This preview calculator is for quick context and is not a formal appraisal.
Bannisterite Localities Map
See where Bannisterite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
Map preview
North ZoneCentral RidgeSouth Basin
Quick Facts
Physical Properties
- Color
- Dark brown
- Hardness (Mohs)
- 4
- Density
- 2.84 g/cm³
- Streak
- Creamy white
Chemical Properties
- Chemical Formula
- (Ca,K,Na)(Mn2+,Fe2+)10(Si,Al)16O38(OH)8 · nH2O n ~ 5.5
- Elements
- Al, Ca, Fe, H, K, Mn, Na, O, Si
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