QUARTZ

Critical industrial mineral, valued for its high silica content, low impurities, and versatility. Mineastra supplies Quartz in Lumps, Grits, Powder, and HPQ (High-Purity Quartz), serving glass, ceramics, electronics, foundries, engineered stone, and construction industries. With partner mine capacity of 8,000–10,000 MT/month, Mineastra delivers consistent bulk supply of Quartz Lumps, Grits, and Powder for glass, ceramics, and industrial buyers.

Packaging & Supply

• Packaging Options:

  • Jumbo bags (1 MT)

  • HDPE woven bags (50 kg)

  • Loose container loading

• Container Capacity: ~25 MT / 20 ft container.

MICRONISED

High-Purity Quartz (HPQ) is the critical raw material for electronics, semiconductors, solar, and optics. Unlike industrial quartz used in glass and ceramics, HPQ requires naturally formed quartz crystals with ultra-low impurities and low electrical conductivity (EC).

Mineastra sources crystalline quartz feedstock from select belts in India and supplies it to global HPQ processors who refine it into specialty applications. With identified partner mines having enough supply capacity, we are aiming to lead the global silicon supply.

Physical Specifications

• Lump Sizes: 20 – 100 mm, 50 – 150 mm, 100 – 250 mm

• Chip Sizes (crushed/crystal chips): 5 – 20 mm, 10 – 30 mm, 20 – 50 mm

• Density / Bulk Density: 2.65 g/cm³ (true quartz density, very consistent)

• Hardness (Mohs): 7

• Thermal Stability: Melting point ~1710°C

• Electrical Properties: Very high dielectric strength, extremely low electrical conductivity (critical for semiconductor uses)

Sorting & Grading

• Sorting Method:

  • Manual handpicking + optical sorting for transparency and low inclusion

  • Acid leaching (HCl, HF) to reduce Fe, Al, Ti to ppm levels

  • High magnetic separation for trace Fe removal

  • Washing, calcination, and controlled crushing for chip production

Applications

• Semiconductors & Electronics:

  • Crucibles for pulling monocrystalline silicon (Czochralski process)

  • Quartz tubes & rods for semiconductor furnaces

  • Wafer carriers, diffusion tubes

• Solar PV Industry:

  • Crucibles & quartz glass for polysilicon melting

  • Quartz tubes for solar furnaces and photovoltaic production

• Optics & Fiber:

  • High-transparency glass for precision optics

  • Optical fibers, lenses, prisms

• Advanced Ceramics & Specialty Uses:

  • High-performance ceramics, quartz ware

  • Aerospace, defense, and laboratory-grade quartz products

Packaging & Supply

• Packaging Options:

  • Acid-washed PE lined jumbo bags (1 MT)

  • Smaller HDPE bags (25 / 50 kg) for chips

  • Wooden crates for crystal lumps (to prevent contamination and mechanical damage)

• Container Capacity: ~25 MT / 20 ft container (bulk bags), lower for premium crystal crates (to avoid breakage)

• Supply Format: Controlled supply, batch-certified with ICP-MS / XRF analysis reports, traceability per lot

Grades of HPQ:

• Solar Grade HPQ: For photovoltaic glass crucibles, solar tubes

• Semiconductor Grade HPQ: For silicon crucibles, silicon wafer production

• Optical Grade HPQ: For high-precision lenses, fiber optics