woolastonite ultrafin
Wollastonite: Mineral information, data and localities. Named in 1818 by J. Léman in honor of William Hyde Wollaston [August 6, 1766 East Dereham, Norfolk, England, United Kingdom - December 22, 1828 London, England, United Kingdom], English chemist and mineralogist who discovered palladium (1804) and rhodium (1809) and invented the reflecting goniometer (1809) and the camera lucida (1812).