What is "manganvesuvianite"

n. (context mineralogy English) A tetragonal-dipyramidal deep maroon red mineral containing aluminum, calcium, hydrogen, iron, magnesium, manganese, oxygen, and silicon.

Manganvesuvianite is a rare mineral with formula CaMn(Al,Mn,Fe)(Mg,Mn)(SiO)(SiO)O(OH). The mineral is red to nearly black in color. Discovered in South Africa and described in 2002, it was so named for the prevalence of manganese in its composition and its relation to vesuvianite.