Recent Minerals News
The mineral kingdom is a basic group of natural, inorganic objects, and there are more than 5,300 known mineral species. Silicate minerals containing silicon and oxygen comprise more than 90 percent of the Earth's crust. Minerals are primarily distinguished by their chemical and physical properties. Common distinguishing characteristics of minerals include crystal structure, hardness, luster, color, cleavage, and specific gravity.
Certain types of rock, such as granite, sandstone, and limestone, are used for construction or statuary purposes; others such as diamonds and gemstones are often cut, polished, and used in pieces of jewelry; still others, in trace amounts, are used for nutritional purposes.
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