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The softest rock on the planet and it's composed of magnesium, silicon, oxygen, and hydrogen. Chemically, talc is a hydrous magnesium silicate with a chemical formula of Mg3Si4O10(OH)2.

Talc is a magnesium silicate that has been hydrated. Talc deposits are formed when high magnesium rocks are transformed by siliceous hydrothermal fluids. The majority of talc comes from dolomite or ultramafic intrusive rocks that have been altered. Talc is often found in combination with other minerals after this phase. The most common associated minerals are carbonates and chlorite.

The morphology and mineralogy of each talc deposit are different, but all talcs almost have the same properties such as softness, water repellency, chemical inertness, and an affinity for organic substances. Talc is a highly used industrial raw mineral in more than 74 industries such as plastics, paper, ceramics, tires, paint, roofing material and etc. 

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