Magnesite

Category: Carbonate mineral

 

Chemical formula: MgCO3

 

Strunz classification: 05.AB.05

 

Crystal system: Trigonal - Hexagonal Scalenohedral H-M Symbol 32/m Space Group: R3c

 

Mohs scale hardness: 3.5 - 4.5

 

Specific gravity: 3.0 - 3.2

 

Optical properties: Uniaxial (-)

 

Refractive index: nω=1.508 - 1.510 nε=1.700

 

Mohs scale hardness: 3.5 - 4.5

 

 

Done