Pyrophyllite is a silicate of aluminum. The sample at right has the labeled composition Al2Si4O10(OH)2. It is about 14x8 cm and is from Indian Gulch, Mariposa County, California. These samples are displayed in the Smithsonian Museum of Natural History.

This sample has the labeled composition AlSi2O5(OH). It is about 6x9 cm and is from Staley, North Carolina.

Mindat: Pyrophyllite

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