Rhodonite

Formula - CaMn₃Mn[Si₅O₁₅]

Mineral Group - a silicate mineral of the rhodonite group

Crystal System - triclinic

Crystal Habit - typically tabular, rough

Color - red, pink, grayish, reddish brown

Cleavage - perfect on {110} & {110}; good on {001}

Fracture - irregular, uneven, conchoidal

Luster - vitreous, pearly

Diaphaneity - transparent to translucent

Moh's Scale Hardness - 5 1/2 - 6 1/2

Streak - white

Specific Gravity - 3.57 - 3.76

Named After - its color from the Greek ρόδον, "rose" in 1819 by Christoph Friedrich Jasche.

Type Locality - Kaiser Franz Mine, Saxony-Anhalt, Germany