Bustamite
A variety of Minerals
What is Bustamite?
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 (-).
Optical Properties
- Refractive Index
- 1.662-1.707
- Birefringence
- 0.014-0.015
- Optical Character
- Biaxial negative
Bustamite Market Value Calculator
Estimate the market value of Bustamite using size, quality, and finish. This preview calculator is for quick context and is not a formal appraisal.
Bustamite Localities Map
See where Bustamite is found with a localities map, collecting zones, and geology context. Generate a sample map preview below.
The Meaning
Bustamite was once believed to have formed from the tears of Native American women who were crying over the loss of their husbands. Eagles would sometimes fly down, collect smaller stones and take them back to their nest. When early Native Americans witnessed this they began carrying the stones around for good luck.
Quick Facts
Physical Properties
- Color
- Pale to medium pink, brownish-red, colourless to yellowish-pink in transmitted light
- Hardness (Mohs)
- 5.5 - 6.5
- Density
- 3.421 g/cm³
- Streak
- White
Chemical Properties
- Chemical Formula
- CaMn2+(Si2O6)
- Elements
- Ca, Mn, O, Si
Identify Bustamite Instantly
- Snap a photo, get instant results
- 6,700+ rocks, minerals & crystals
- Discover collecting spots near you
%252FAbenakiite-(ce)-01.jpg&size=small)
