Glass · Foundry · Ceramics
Silica Sand
SiO2Washed and graded silica sand with consistent grain, high silica, low iron, and low moisture.
Silica SandSkylark ExportsIndustrial minerals
Industrial minerals from Skylark Exports for ceramics, glass, foundry, paint, paper, and refractory plants.
- Silica Sand
- Quartz Powder
- Kaolin Clay
- Calcined Kaolin
- Feldspar
- Refractory Clay
- Blended Clay
Products
Silica sand, quartz powder, kaolin, calcined kaolin, feldspar, and clay grades exported by Skylark Exports.
Paints · Coatings · Ceramics
Quartz Powder
SiO2Ground quartz with a controlled mesh, stable brightness, and a clean particle-size curve.
Quartz Powder
Ceramics · Paper · Paint
Kaolin Clay
Al2Si2O5(OH)4China clay selected for whiteness, plasticity, and low impurities in bodies and coatings.
Kaolin Clay
Paints · Paper · Rubber
Calcined Kaolin
Al2O3·2SiO2Heat-treated kaolin with higher brightness, opacity, and hardness than raw china clay.
Calcined Kaolin
Tile · Sanitaryware · Glass
Feldspar
KAlSi3O8A stable alkali flux with low iron so ceramic bodies, glazes, and glass stay predictable in the fire.
Feldspar
Refractories · Kiln furniture · Foundry
Refractory Clay
Fire clay with the alumina level and thermal stability to hold shape at high temperature.
Refractory Clay
Ceramic bodies
Blended Clay
A repeatable clay blend whose plasticity, green strength, and firing shrinkage match the buyer’s body.
Blended ClayIndustries
Industrial minerals Skylark Exports supplies to ceramics, glass, foundry, paint, paper, refractory, and construction plants.
Ceramics and tile
Tile, sanitaryware, and tableware plants use clay, feldspar, silica, and quartz so the body stays plastic and the fire stays predictable.
Glass
Glass batches need silica that stays high and low in iron, plus a feldspar flux whose alkali does not drift.
Foundry
Foundries buy graded silica for moulds and cores, and refractory clay where the hot face has to hold.
Paints and coatings
Coatings use ground quartz, kaolin, and calcined kaolin for mesh, brightness, and opacity in the film.
Paper
Paper coatings use kaolin for shade and smoothness, and calcined kaolin when opacity has to go further.
Refractories
Refractory and kiln-furniture bodies need fire clay with alumina and a shape that survives temperature.
Construction
Construction uses graded silica sand where grain size and cleanliness matter more than a glass-grade iron limit.
Rubber and plastics
Rubber, plastics, and cable compounds use kaolin, calcined kaolin, and quartz powder as controlled fillers.
What a buyer can count on
Three checks that sit in front of a quote: the grade stays the same, the packing is named, and the papers match the lot.
Consistency
The same grain, mesh, or blend from lot to lot, so a furnace, mould line, or coating mill is not requalifying every shipment.
Packing
Typical export packing is 25 kg bags, 50 kg bags, 1 MT jumbo bags, or bulk. Which of those a grade is offered in is confirmed on the inquiry.
Export-ready documents
A shipment is described with a certificate of analysis, a packing list, and an invoice for that lot. Those files are not sample downloads on this site.
Quality
Material is selected, graded, checked, and packed before it ships. The quality page describes that path, including the certificate of analysis, packing list, and invoice a buyer asks to see for the lot.
Quality control and packingNotes
Notes from Skylark Exports on mineral grades, applications, and what to include in an export inquiry.
ExportWhat an export inquiry should include
What to include in a mineral export inquiry: the product, the spec limits, the packing, your destination port, and the quantity, so a quote can match the plant.
ApplicationsKaolin and calcined kaolin: which one a coating line actually needs
Hydrous kaolin against calcined kaolin for coatings, paper, rubber, and plastics, and when brightness, opacity, and hardness mean raw clay is not enough.
GradesHow buyers compare silica sand grades
How buyers compare silica sand grades by mesh or AFS grain, iron as Fe2O3, and moisture, and which of the three moves a glass, foundry, or ceramic purchase.
Request a quote
Name the mineral, the limit that matters on your line, packing, and quantity.