mineral resource
natural resources (including non-mineral substances) with economic value deposited in the Earth's crust
natural resources of Africa
natural resources of Africa, including diamonds, sugar, salt, gold, iron, cobalt, uranium, copper, bauxite, silver, petroleum, and cocoa beans, but also tropical timber and tropical fruit (the non-English labels have slightly different scope)
industrial mineral
geological materials mined for commercial value in industry
rock salt
rock composed mainly of halite
fossil fuel
combustible fuel containing hydrocarbons formed by natural processes such as anaerobic decomposition of buried dead organisms, examples being coal, petroleum and natural gas
mineral resource
solid mineral (inorganic) substance with economic value found in natural deposits
lake ore
accumulation of ore at the bottom of a lake
ore
rock containing one or more valuable minerals, mined for metals but also non-metals that can be extracted from the minerals; metal ores usually contain the metals as parts of compounds with other elements