Wollastonite
Wollastonite is a calcium inosilicate
mineral that may contain small amounts of
iron,
magnesium, and
manganese substituting for calcium. It is usually white. It forms when impure
limestone or dolostone is subjected to high temperature and pressure sometimes in the presence of silica-bearing fluids as in skarns or contact metamorphic rocks.
Encyclopedia
Wollastonite is a calcium inosilicate
mineral that may contain small amounts of
iron,
magnesium, and
manganese substituting for calcium. It is usually white. It forms when impure
limestone or dolostone is subjected to high temperature and pressure sometimes in the presence of silica-bearing fluids as in skarns or contact metamorphic rocks.