20 Microns Limited offers Hydrated Magnesium Silicate Natural Talc. 20 Microns Limited is an ISO 9001:2000 certified company. The company manufactures White Minerals of supreme quality, Functional fillers, Extenders and Speciality chemicals. The Hydrated Magnesium Silicate Natural Talc is a mineral composed of hydrated magnesium silicate. The Hydrated Magnesium Silicate Natural Talc naturally occurs as foliated to fibrous masses, its monoclinic crystals being so rare as to be almost unknown. Natural Talc has a perfect basal cleavage, and the folia are non-elastic, although slightly flexible. The colour of Talc ranges from white to grey or green and it has a distinctly greasy feel.