Metallurgy is the science of the study of extracting metals from their ores and modifying the metals for commercial use.
The earth’s crust is the major source of metals. Seawater also contains some soluble salts such as sodium chloride, magnesium chloride, etc.
Minerals: The elements or compounds, which occur naturally in the earth’s crust, are known as minerals.
Ores: The minerals from which a metal can be profitably extracted are called ores.