garnet sand
PROPERTIES Chemical Composition – Typical Silica SiO2 34-40% Iron(Fe2O3+FeO) 25-31% Alumina Al2O3 17-21% Magnesium MgO 5-6% Calcium CaO 5.0-10.0% Manganese MnO 0-1.0% Physical Characteristics – Typical Specific Gravity 4.0-4.1/cm3 Mohs Hardness 7.5+ Acid Solubility