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Posted by Admin on May, 07, 2026
Quartz Powder · Silica Powder
for Paint & Filler Industries
India's trusted manufacturer, supplier & bulk exporter of high-purity Quartz Powder and Ground Silica for the global paint, coating, filler, rubber, plastic, adhesive, sealant, construction chemical & specialty industries.
What is Quartz Powder? (क्वार्ट्ज पाउडर | Poudre de Quartz | Quarzpulver | 石英粉)
Quartz Powder — also known as Ground Silica, Silica Powder, Silica Flour, or Microsilica Filler — is one of the most widely used industrial minerals on the planet. With a chemical formula of SiO₂ (Silicon Dioxide) and purity levels exceeding 99%, ultra-fine quartz powder from Aalok Overseas India delivers unmatched performance as a functional filler, extender, and reinforcing agent across dozens of industrial applications.
Quartz is the second most abundant mineral in the Earth's crust, and when carefully mined, beneficiated, and precision-ground from high-purity vein quartz or quartzite deposits, it becomes a transformative ingredient that improves performance properties in paints, coatings, rubber, plastics, adhesives, sealants, construction chemicals, and specialty industrial formulations.
Aalok Overseas India is a vertically integrated manufacturer operating mining leases, beneficiation plants, and grinding facilities in the quartz-rich mineral belts of Rajasthan. We supply a comprehensive range of quartz powder grades — from coarse 50 mesh surface fillers to ultra-fine 1250 mesh paint-grade powders — each engineered to meet the specific technical demands of the paint and filler industry.
Industry Insight: Quartz Powder (Ground Silica) is the single most widely used functional filler in the global paint and coatings industry. It is estimated that over 60% of all architectural paints, industrial coatings, and powder coatings use silica powder as a primary extender pigment. Its combination of high purity, chemical inertness, controlled particle size, excellent whiteness, and cost efficiency makes it irreplaceable in modern paint formulation.
The Aalok Overseas Quartz Advantage — Purity at the Source
Not all quartz is equal. The properties of quartz powder are fundamentally determined by the purity, colour, and mineralogy of the raw quartz at the mine. Aalok Overseas sources exclusively from high-purity vein quartz and quartzite deposits in Rajasthan — the finest quartz-bearing geological terrain in India — where natural SiO₂ content exceeds 99% before any processing.
Why Rajasthan Quartz is the World Standard
The Aravalli Mountain Range in Rajasthan contains one of Asia's most extensive and high-purity quartz mineral belts. The geological conditions here — ancient Precambrian metamorphic terrains — have produced exceptionally pure, crystalline quartzite and vein quartz with:
- Naturally high SiO₂ content (98.5–99.8%) without chemical treatment
- Extremely low iron oxide (Fe₂O₃ < 0.05–0.10%) — critical for paint whiteness
- Low titanium, calcium, and magnesium — essential for chemical inertness in coating applications
- Consistent crystalline structure — predictable grinding behaviour and narrow PSD
- Natural white to off-white colour — high Hunter Lab whiteness without bleaching
- Abundance and large-scale mineable reserves — supply security for long-term contracts
Our Processing Flow — Mine to Micron
Mining & Blasting
Selective mining of high-purity quartz zones from approved lease areas
Primary Crushing
Jaw crusher reduces run-of-mine quartz to 10–30mm feed size
Washing & Scrubbing
Removes surface clay, iron staining, and impurity coatings
Magnetic Separation
High-intensity WHIMS removes iron-bearing minerals below 0.05% Fe₂O₃
Precision Milling
Ball mills, Raymond mills, and impact mills grind to specified mesh
Air Classification
Dynamic air classifiers achieve tight PSD (D50, D97 control)
QC & Testing
XRF, sieve, whiteness, moisture, pH and oil absorption testing
Packing & Dispatch
25/50 kg bags, jumbo bags, or bulk; export documentation ready
Chemical Composition & Technical Specifications
Aalok Overseas supplies quartz powder in multiple quality grades, each optimised for specific end-use industries. All batches are tested by XRF and particle size analysis before dispatch. Certificate of Analysis (COA) is provided with every shipment.
| Parameter | Standard Grade | Paint Grade | Ultra-Pure Grade | Surface Coating Grade | Filler Grade |
|---|---|---|---|---|---|
| SiO₂ (Silica) | 98.0–98.8% | 98.5–99.2% | 99.2–99.8% | 98.8–99.5% | 97.5–98.5% |
| Al₂O₃ (Alumina) | <0.80% | <0.60% | <0.40% | <0.50% | <1.00% |
| Fe₂O₃ (Iron Oxide) | <0.12% | <0.05% | <0.03% | <0.04% | <0.15% |
| TiO₂ | <0.06% | <0.04% | <0.02% | <0.03% | <0.08% |
| CaO | <0.10% | <0.08% | <0.05% | <0.06% | <0.15% |
| MgO | <0.08% | <0.05% | <0.03% | <0.04% | <0.10% |
| K₂O + Na₂O | <0.50% | <0.35% | <0.20% | <0.25% | <0.60% |
| LOI (Loss on Ignition) | <0.30% | <0.20% | <0.10% | <0.15% | <0.40% |
| Moisture | <0.50% | <0.30% | <0.20% | <0.20% | <0.50% |
| Whiteness (Hunter Lab) | 82–88% | 88–93% | 93–97% | 90–95% | 78–85% |
| pH (5% slurry) | 6.5–7.5 | 6.8–7.2 | 7.0–7.5 | 6.8–7.2 | 6.5–7.5 |
| Oil Absorption (g/100g) | 18–25 | 16–22 | 14–20 | 15–21 | 20–28 |
| Specific Gravity | 2.63 – 2.66 g/cm³ | ||||
| Mohs Hardness | 7.0 | ||||
| Refractive Index | 1.544 – 1.553 | ||||
| Melting Point | 1710°C | ||||
Particle Size Range — Mesh, Micron & Application Guide
| Mesh / Grade | D50 (µm) | D97 (µm) | Key Industries | Packing |
|---|---|---|---|---|
| 30 – 60 Mesh | 300–500 µm | 600 µm | Texture paints, decorative plaster, floor coatings, grouts | 50 kg / Bulk Bags |
| 100 Mesh | 120–150 µm | 180 µm | Exterior wall coatings, cement paints, putties | 50 kg PP Bags |
| 150 Mesh | 80–100 µm | 130 µm | Industrial primers, epoxy coatings, road markings | 50 kg PP Bags |
| 200 Mesh | 55–75 µm | 100 µm | General paint filler, rubber, adhesives, sealants | 50 kg Laminated Bags |
| 300 Mesh | 35–50 µm | 75 µm | Interior emulsion, powder coatings, construction chemicals | 25 / 50 kg HDPE |
| 325 Mesh | 30–45 µm | 65 µm | High-quality emulsion paints, architectural coatings | 25 / 50 kg HDPE |
| 400 Mesh | 20–35 µm | 50 µm | Premium paint, PVC, cable compounds, specialty coatings | 25 kg Paper Bags |
| 500 Mesh | 15–25 µm | 40 µm | High-gloss paints, SMC/BMC, polymer compounds | 25 kg Valve Bags |
| 600 – 800 Mesh | 10–18 µm | 28 µm | Premium coatings, silicone sealants, dental composites | 25 kg Valve Bags |
| 1000 Mesh | 6–12 µm | 20 µm | Ultra-premium paint, specialty polymers, advanced fillers | 25 kg Valve Bags |
| 1250 Mesh | 4–8 µm | 14 µm | High-performance coatings, technical composites, cosmetics | 25 kg Valve Bags |
Grade Portfolio — Product Line Overview
Ultra-white, ultra-low iron. Designed for premium architectural and industrial paint formulations. SiO₂ > 99%.
Cost-efficient high-volume filler for putty, plaster, cement paint, road marking, and construction applications.
Narrow PSD for high-gloss coatings, SMC/BMC panels, powder coatings, and specialty polymer compounds.
Consistent oil absorption and particle shape for rubber and plastic compounding, adhesives, and sealants.
Micronized precision grade for technical composites, pharmaceutical excipients, dental, and advanced ceramics.
Coarser angular grits for texture paints, decorative renders, anti-slip coatings, and pool plasters.
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