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SiO2 | approx. 97.0 % |
Al2O3 | approx. 1.1 % |
Fe2O3 | approx. 0.3 % |
Loss on Ignition | approx. 0.2 % |
Specific density | approx. 2.65 g/cm³ |
Bulk density | approx. 1400 – 1600 kg/m³ |
Hardness | approx. 7 Mohs |