High-Purity Silica Quartz (SiO2)
Rock Astra Minerals is a premier supplier of high-purity Silica Quartz lumps, grains, and processed mesh powders. Sourced from our premium mining blocks, our quartz contains silicon dioxide concentrations exceeding 99.5% with ultra-low iron impurities.
Due to its outstanding hardness, high melting threshold, and chemical resistance, our quartz functions as a critical raw material in semiconductor crucibles, solar panel glass, optical lenses, high-performance ceramics, paints, and protective coating fillers.
Technical Grades Specifications
| Grade | Description | Target Applications |
|---|---|---|
| Grade A | Ultra-high purity lumps (>99.7% SiO2, Fe2O3 < 0.01%). Highly translucent and glassy. | Semiconductor glass, solar cell panels, optical glass formulation. |
| Grade B | Premium white crystalline lumps (>99.2% SiO2, Fe2O3 < 0.03%). High structural whiteness. | Luxury tableware glazes, paint fillers, engineered quartz slabs. |
| Grade M | Standard industrial Quartz lumps (>98.5% SiO2). High thermal stability. | Refractories, abrasive bonds, foundry sand castings. |