... ores ,copper ores ,tinores ,ilmentite ,pyrite ,hematite ,limonite ,chromite ,ferberite ,tungsten ores ,tantalite ores ,coal ores ,gravity selecting for the ferrous ... of iron ore, iron ore, titanium chromite, pyrite, zirconium stones, rutile, monazite, phosphorus b ore, tungsten, tin, tantalum, niobium ore and with ore proportion ...