About Tschermakite
A calcium-rich amphibole, part of the Hornblende group, typically dark green to black. It's a grounding stone promoting strength and resilience.
Primary Hues
Dark Green, Black, forms prismatic crystals
Geological & Scientific Details
Tschermakite is classified as a silicate mineral (amphibole) mineral which typically crystallizes in the monoclinic system. Its chemical formula is ☐Ca2(Mg3Al2)(Si6Al2)O22(OH)2. Common crystal habits include as prismatic crystals or as reaction rims on other minerals.
Key Geological Properties:
- Mineral Category: Silicate mineral (amphibole)
- Chemical Formula: ☐Ca2(Mg3Al2)(Si6Al2)O22(OH)2
- IMA Symbol: Tsr[1]
- Crystal System: Monoclinic
- Predominant Geological Color: Medium to dark green to green-black to black, brown (rare)
- Crystal Habit: As prismatic crystals or as reaction rims on other minerals
- Twinning: Simple or multiple twinning parallel to {100}
- Cleavage: Perfect on {110} Parting on {100}{001}
- Luster: Vitreous
- Streak: Pale grey-green
- Diaphaneity: Transparent