Pyroxmangite

Formula: MnSiO₃

Origin of name: from pyroxene and manganese

Crystal system: triclinic

Crystal class: -1

Twinning: 

Unit cell: 

Colour: pink, purplish pink, yellowish red-brown to dark brown

Diaphaneity: transparent to translucent

Luster: vitreous to pearly on fresh surfaces

Habit: crystals tabular, massive, cleavable to compact, embedded grains

Hardness: 5.5 to 6

Specific gravity: 3.61 to 3.80

Cleavage: 4; {110} and {1-10} perfect, {010} and {001} poor

Tenacity: 

Streak: 

Synonyms/varieties:

Comments: series with pyroxferroite