Talc Talc Talc or talcum is a clay mineral composed of hydrated magnesium silicate with the chemical formula HMg(SiO) or MgSiO(OH). In loose form, it is (in ratio with or without corn starch) one of the most widely used substances known as baby powder. It occurs as foliated to fibrous masses, and in an exceptionally rare crystal form. It has a perfect basal cleavage, and the folia are not elastic, although slightly flexible. The Mohs scale of mineral hardness, based on scratch hardness comparison, defines value 1 as the hardness of talc. Talc can easily be scratched by a fingernail. Talc
Mineral industry of Azerbaijan produced steel products from steel scrap. In 2005, production increased for practically all mineral commodities. Crude petroleum production increased by more than 43% compared with that of 2004. The country was developing its steel industry, although it is still on a small scale. Fuels accounted for 76% of the value of exports in 2005. The country’s major export was crude petroleum, almost all of which was sold on world markets rather than supplied to other CIS countries. Other mineral exports included petroleum refinery products and alumina. The country imported a variety of mineral commodities, including natural gas. Azerbaijan’s major mineral