Stichtite

Stichtite is mined in small amounts. It has a greasy, pearly, waxy luster, with its color ranging from a rosy-pink to purple and has a hardness of 1-1/2 to 2.

Stichtite was first found before 1891 but not formally recognized as a new mineral until 1910. It is named after Robert Carl Sticht, an American-born industrialist and metallurgist who worked in Tasmania from 1897 until his death in 1922.

Mg6Cr3+2(OH)16[CO3] · 4H2O