Quartz is the second most abundant mineral in the Earth's crust. It is a clear, glossy mineral with a hardness of 7 on the MOHS scale. Silica, Sa,is a component of glass and concrete. A form of Silica commonly known as quartz, Silica tetrahedra, is the second most common mineral in the earth's crust, it comes in many different forms. Silica is a compound of silicon and oxygen. Earth's outer crust contains 59% of this material. It has three major rock forms, which are quartz, tridymite, and cristobalite.
Grade A – Superior |
Grade A – Medium |
Grade B |
---|---|---|
All Sides Full White | ||
Free from red and yellow patches | 1 side red/yellow patches | 2 or 3 sides |
In size of 20 mm to 100 mm | In size of 20 mm to 100 mm | In size of 20 mm to 100 mm |
Sio2>99.7%,Fe2O3<0.01% and EC<1 | Sio2>99.5%, Fe2O3<0.04% and EC<10 | Sio2>99.0%, Fe2O3<0.08% and EC<20 |
SILICA (AS SiO2) | 99.62% TO 99.91% |
ALUMINA (AS Al2O3) | 0.0002 |
POTASSIUM (AS K2O) | 0.0001 |
CALCIUM (AS CaO) | 65 PPM |
IRON (AS Fe2O3) | 487 PPM |
SODIUM (AS Na2O) | 349 PPM |
MAGNISIUM (AS MgO) | 33 PPM |
LOSS ON IGNITION | 0.0021 |