PT Visi Niaga Prima is an Indonesian supplier listed on Global Trade Plaza offering silica sand, coal, coconut charcoal briquettes and charcoal. The silica sand is described as low-iron with SiO₂ shown as ",80 (4 Variants)" in the product specification. The coal specification includes a minimum Hardgrove index of 45, feed size 0–50 mm, total moisture up to 11%, volatile matter 24–32%, sulphur ≤ 1.0%, ash ≤ 12%, SiO₂ in ash ≤ 60% and net calorific value ≥ 6,000 kcal/kg. The charcoal listing covers coconut shell and lump hardwood material in Grade A. Buyers can send an enquiry through Global Trade Plaza.