CHEMICAL ANALYSIS
COLOR SiO2 Al2O3 Fe2O3 FeO MnO MgO CaO
GREY 35-40 18--20 0.9-1.0 25-37 0.5-2.0 0.2-1.4 2.2-3.9
PHYSICAL CHARACTERISTICS
Basic Mineral SiO2,Al2O3
Colour Brown,Red
Density 3.90g/cm3 min
Mohs Hardness 7.4-8.0
COLOR SiO2 Al2O3 Fe2O3 FeO MnO MgO CaO
GREY 35-40 18--20 0.9-1.0 25-37 0.5-2.0 0.2-1.4 2.2-3.9
PHYSICAL CHARACTERISTICS
Basic Mineral SiO2,Al2O3
Colour Brown,Red
Density 3.90g/cm3 min
Mohs Hardness 7.4-8.0