98.5% SiO₂ purity. Mohs 7 hardness. The highest-purity, hardest mineral in the Elixir range — from quartz veins in Limpopo Province pegmatite ore bodies.
View Mineral Samples ↓Microsil® is produced from quartz veins within the feldspar-rich pegmatite ore bodies of our Limpopo Province operation. Pegmatite quartz crystallises late in the pegmatite's formation, from the silica-rich residual melt left after the feldspar has formed, and grows as large, coarse crystals that can be separated cleanly from the surrounding feldspar and mica. This geology is why Microsil® delivers 98.5% SiO₂ with low iron (Fe₂O₃ 0.05%) — the highest purity in the Elixir range.
For coatings formulators, ceramic manufacturers and adhesive producers, Microsil® delivers the hardness, inertness and UV resistance required in demanding applications, with the reassurance of production-backed South African supply and full technical documentation.
Typical values. Contact us for specification confirmation.
| Compound | Mean Value |
|---|---|
| SiO₂ | 98.50% |
| Al₂O₃ | 0.80% |
| Fe₂O₃ | 0.05% |
| K₂O | 0.10% |
| Na₂O | 0.10% |
| CaO | 0.10% |
| LOI | < 0.50% |
| Property | Microsil® 2 | Microsil® 5 | Microsil® 15 |
|---|---|---|---|
| d50 (μm) | 10.6 | 17.1 | 20.9 |
| Oil Absorption (%) | 29 | 23 | 21 |
| Reflectance (%) | 95 | 94 | 93 |
| Bulk Density (kg/L) | 0.70 | 0.75 | 0.90 |
| SG (kg/L) | 2.65 | 2.65 | 2.65 |
| Hardness (Mohs) | 7 | 7 | 7 |
| Melting Point (°C) | >1200 | >1200 | >1200 |
Microsil® high-purity silica from our Limpopo Province pegmatite operation. Three grades covering fine to coarse particle sizing across coatings, construction and ceramics applications.
One of three Microsil® grades, 98.5% SiO₂ purity from Limpopo Province pegmatite quartz.
One of three Microsil® grades, 98.5% SiO₂ purity from Limpopo Province pegmatite quartz.
One of three Microsil® grades, 98.5% SiO₂ purity from Limpopo Province pegmatite quartz.
