FSiix Resources sources export-grade glassy quartz from the East African pegmatite belts of Tanzania and Mozambique. Known in the trade as high-purity quartz, ultra-clear lump quartz, or vitreous silica lump, this material is in demand from East Asian processors producing optical glass, silicon metal, quartz crucibles, engineered stone, and semiconductor-grade raw materials. Each shipment is graded by SiO₂ purity and by limits on iron, aluminium, titanium, alkalis, and calcium, and is supported by pre-shipment assay documentation.
Glassy quartz is a high-silica raw material recovered from lithium-tantalum-feldspar pegmatite systems. Its value depends on how clear, pure, and free of inclusions the lump is, and that is determined mainly by the iron, aluminium, titanium, and alkali content of the source rock rather than by size alone.
FSiix sorts and grades material across three commercial grades, matching each lot to the buyer's chemical and visual specification. Tanzanian and Mozambican pegmatite zones give buyers two distinct, documented origins for supply continuity.
Each lot follows a controlled route from the mine face to the export terminal, with testing at the point where the grade is set.
Material is selected from established pegmatite belts in Tanzania (Dodoma, Singida, Morogoro, Tanga, Ruvuma) and Mozambique (Zambézia, Nampula, Tete), where clear, low-iron lump quartz is recovered.
Lump is hand-sorted and washed to remove mica flakes, tourmaline needles, feldspar intergrowths, and soil, then graded into Grade A, B, or C and sized to buyer requirements.
Lots are tested by XRF or ICP-MS before shipment and cleared with third-party inspection certificates, then exported from Dar es Salaam, Nacala, or Beira on an FOB or CIF basis.
Purity and clarity set the end use. Higher-grade lump feeds optical and semiconductor chains, while lower grades serve metallurgy and surface materials.
Buyers in China, South Korea, and Japan typically specify glassy quartz by SiO₂ purity, transparency, and maximum levels of iron, aluminium, titanium, alkalis, and calcium. The grades below set those limits.
| Parameter | Grade A High-Purity / Optical |
Grade B Industrial / Semiconductor Feed |
Grade C Engineered Stone / Glassware |
|---|---|---|---|
| SiO₂ purity | ≥ 99.90% | 99.50%–99.89% | 98.50%–99.49% |
| Appearance | Ultra-clear, vitreous; no fractures or smokiness | Clear, vitreous; milkiness < 5% | Semi-transparent, translucent glassy lump |
| Iron (Fe₂O₃) | < 10 ppm | < 30–50 ppm | < 100 ppm |
| Aluminium (Al₂O₃) | < 20–30 ppm | < 100 ppm | < 300 ppm |
| Titanium (TiO₂) | < 5 ppm | < 15 ppm | < 30 ppm |
| Alkalis (Na₂O + K₂O) | < 10 ppm | < 30 ppm | < 50 ppm |
| Calcium (CaO) | < 10 ppm | < 20 ppm | < 50 ppm |
Tanzania and Mozambique host some of the region's most productive quartz pegmatite belts, with different export hubs and regulatory routes for each country.
Pegmatite zones: Dodoma & Singida (central plateau, high purity, low iron); Tanga & Morogoro (Uluguru belts); Ruvuma & Mtwara (southern border).
Profile: Central Tanzanian quartz often shows ultra-clear, vitreous structure with native iron below 15 ppm.
Export: Dar es Salaam (FOB). Requires Mining Commission export permit, state royalty payment (typically 6%), and TEATTI/GCLA mineral analysis.
Pegmatite zones: Zambézia (Alto Ligonha, optical and gem grade); Nampula (lump quartz and feldspar pegmatites); Tete (industrial and metallurgical lump).
Profile: High-volume glassy lump with minimal weathering, sometimes co-mined with tantalum, tourmaline, and feldspar.
Export: Nacala or Beira. Requires an INAMI export licence and a customs declaration confirming origin and royalty payment.
Buyers can specify origin by grade. Central Tanzanian material suits low-iron Grade A requirements, while Mozambican lump supplies volume for Grade B and C programmes.
Processors in Jiangsu, Shandong, and Guangdong buy high-purity lump (SiO₂ ≥ 99.9%) for high-purity quartz powder, and Grade B/C lump for silicon metal and engineered stone. Strict XRF or ICP-MS testing before shipment; competitive CIF pricing to Qingdao, Tianjin, Ningbo, and Shanghai.
Semiconductor material suppliers and optical glass makers require ultra-pure lump (SiO₂ > 99.9%, Fe < 10 ppm) with zero metallic inclusions, consistent quality, and third-party pre-shipment inspection (SGS, Intertek, or Alex Stewart International).
Fused silica and crystal-growth producers require Grade A material with ultra-low alkali (Na + K < 10 ppm) and iron, traceable supply chains, and consistent sample testing matched to contract limits before bulk dispatch.
Glassy quartz pricing depends on grade, purity, sizing, and origin, so we don't publish a static reference price here.
Contact our trading desk with your required grade, volume, sizing, and destination port for a current quotation.
Tell us your grade, volume, sizing, and destination port, and the FSiix trading desk will respond with origin options and current pricing.