Feodosiyite
A variety of Minerals
What is Feodosiyite?
Feodosiyite is a very rare chloride mineral, just recently approved, with the formula Cu11Mg2Cl18(OH)8•16H2O. Its structure is unique. Feodosiyite comes from the Tolbachik volcano, famous for many rare fumarolic minerals. Chemically similar minerals, chlorides containing both copper and magnesium, include haydeeite, paratacamite-(Mg) and tondiite.
Feodosiyite Market Value Calculator
Estimate the market value of Feodosiyite using size, quality, and finish. This preview calculator is for quick context and is not a formal appraisal.
Feodosiyite Localities Map
See where Feodosiyite 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
- Bright green
- Hardness (Mohs)
- 3
- Density
- 2.563 g/cm³
Chemical Properties
- Chemical Formula
- Cu11Mg2Cl18(OH)8·16H2O
- Elements
- Cl, Cu, H, Mg, O
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