Mining Solutions services. Mining exploration & Research Sales of Metals; Major & Rare Metals & minerals (Ferrous & Non-ferrous) . El-rok Limited is able to supply: Metal concentrates such as: -- Tungsten-60-80% - Arsenic-40% -60% . - Titanium dioxide-60-80% - Lead Ores-Pb-55% , Pb-75% -Pb-Content. - Zinc concentrates--64% -Zn-Content. - Bismuth concentratres-50% -73% -91% . - Copper Ores-15% to 34% Cu-Content. - Manganese OresTANTALITECOLUMBITETIN Ores.COAL - STEAM COALCHARCOALGEM STONES