Tin
n is a chemical element with the symbol Sn (from Latin: stannum) and atomic number 50. ... Tin is a...
Iron Ore
The chief ores of iron consist mainly of the oxides: hematite, Fe2O3 ; goethite, alpha -FeO(OH); magnetite, Fe3O4; and the...
Diamond
Diamond mineralDiamond, a mineral composed of pure carbon. It is the hardest naturally occurring substance known; it is also the...
Limestone
Limestone, sedimentary rock composed mainly of calcium carbonate (CaCO3), usually in the form of calcite or aragonite. ... It may...
Mica
Mica is a mineral name given to a group of minerals that are physically and chemically similar. They are all...