Friedelite
A variety of Pyrosmalite Group
What is Friedelite?
Optical Properties
- Refractive Index
- 1.627-1.663
- Birefringence
- 0.032-0.035
- Pleochroism
- None
- Optical Character
- Uniaxial negative
Friedelite Market Value Calculator
Estimate the market value of Friedelite using size, quality, and finish. This preview calculator is for quick context and is not a formal appraisal.
Friedelite Localities Map
See where Friedelite 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
- Tan, brown, "beef steak" red-brown, dark brown
- Hardness (Mohs)
- 4 - 5
- Streak
- White
Chemical Properties
- Chemical Formula
- Mn2+8Si6O15(OH,Cl)10
- Elements
- Cl, H, Mn, O, Si
FREE APP
4.7
Identify Friedelite Instantly
- Snap a photo, get instant results
- 6,700+ rocks, minerals & crystals
- Discover collecting spots near you