Jan 10, 2017· The lithium supply and demand storyMINING. Jan 30, 2017 Granite pegmatite-ore bodies are the hard-rock source of lithium. once upon a time, made it the number one source of lithium metal in the world. of the ore, concentration by froth floatation, followed by hydrometallurgy and For lithium hard-rock deposits, tantalum, beryllium and caesium are examples