Foitite
A variety of Tourmaline Group
What is Foitite?
Optical Properties
- Pleochroism
- Strong: pale lavender, dark blue
- Optical Character
- Uniaxial negative
Foitite Market Value Calculator
Estimate the market value of Foitite using size, quality, and finish. This preview calculator is for quick context and is not a formal appraisal.
Foitite Localities Map
See where Foitite 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 indigo with purple tints to bluish-black
- Hardness (Mohs)
- 7
- Density
- 3.14 g/cm³
- Streak
- Greyish-white
Chemical Properties
- Chemical Formula
- (□,Na)(Fe2+2Al)Al6(Si6O18)(BO3)3(OH)3OH
- Elements
- Al, B, Fe, H, O, Si
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