Hedenbergite
Mineral CaFeSi2O6
About it
Dark green to black prisms and radiating sprays in skarn, the iron partner of diopside; Dalnegorsk, Russia, and Elba, Italy, give fine crystals.
- Type
- Mineral
- Group
- Silicate (inosilicate), pyroxene group
- Formula
- CaFeSi2O6
- Hardness (Mohs)
- 5.5–6.5
- Specific gravity
- 3.5–3.56
- Streak
- white to greenish grey
- Lustre
- vitreous (glassy)
- Crystal system
- Monoclinic
- Colours
- dark green, brownish black, black
- Transparency
- transparent, translucent, opaque
- Cleavage and fracture
- good in two directions at nearly 90°
Typical values: real specimens vary. For more, see mindat.org.