Talc

Info: Talc is the softess known mineral. Talc cannot be found in well grown crystals, he is mostly found in various agregates. Talc is usually white, but it can be grey or greenish. Talc is translucent in thin layers.

How to recognize: Talc feels greasy. It cannot be dissolved in acids or melted.

Found: Talc was found in Rabenwald, Zilertal (Austria), Gopfersgrun in Germany, St. Gothard and Hospental (Switzerland), Madras (India) and some deposits were found in South Africa.

Used for: Talc is used in paper filling and in rubber industry. Powder of talc is used in cosmetics and pharmacy, but also in creating of heat-resistant walls in industry and elektroceramics.

Crystal structure
Monoclinic
Hardness
1
Color
Colourless, various colours
Luster
Greasy to pearl