Minerals identify

Know how to recognize them

Bustamite

Inosilicate

Bustamite is a calcium manganese inosilicate (chain silicate) and a member of the wollastonite group. Magnesium, zinc and iron are common impurities substituting for manganese. Bustamite is the high-temperature polymorph of CaMnSi2O6 and johannsenite is the low temperature polymorph. The inversion takes place at 830 °C (1,530 °F), but may be very slow. Bustamite could be confused with light-colored rhodonite or pyroxmangite, but both these minerals are biaxial (+) whereas bustamite is biaxial (-).

Identification

Color of mineral

Pink
Red
Brown

Mohs scale ( mineral hardness )

5.5

Density ( specific gravity )

1.64
1.651
1.653

Luster ( interacts light )

Vitreous

Crystal ( diaphaneity )

Triclinic