Matte, crude mixture of molten sulfides formed as an intermediate product of the smelting of sulfide ores of metals,…

Smelting, process by which a metal is obtained, either as the element or as a simple compound, from…

Stone Age, prehistoric cultural stage, or level of human development characterized by the creation and use of stone tools.…

Silver (Ag), chemical element, a white lustrous metal valued for its decorative beauty and electrical conductivity. Silver is located…

Gold (Au), chemical element, a dense lustrous yellow precious metal of Group 11 (Ib), Period 6, of the periodic table.…

Metallurgy, art and science of extracting metals from their ores and modifying the metals for use. Metallurgy…

Mineral deposit, aggregate of a mineral in an unusually high concentration. About half of the known chemical elements possess some metallic properties. The…

Smelting Perhaps 1,000 years after humans learned about melting virgin copper, they found that still another…

Ore, a natural aggregation of one or more minerals that can be mined, processed, and…

Mining, process of extracting useful minerals from the surface of the Earth, including the seas. A mineral, with…