About Sekaninaite
The iron-rich analogue of Cordierite (Iolite), exhibiting similar pleochroism. It's a vision stone, aiding intuition and understanding complex situations, with a more grounding influence from iron.
Primary Hues
Blue, Violet-Blue, Grey, Greenish, Brownish, strongly pleochroic
Geological & Scientific Details
Sekaninaite is classified as a cyclosilicate mineral which typically crystallizes in the orthorhombic system. Its chemical formula is (Fe+2,Mg)2Al4Si5O18. Common crystal habits include as poorly developed crystals.
Key Geological Properties:
- Mineral Category: Cyclosilicate
- Chemical Formula: (Fe+2,Mg)2Al4Si5O18
- IMA Symbol: Skn[1]
- Crystal System: Orthorhombic
- Predominant Geological Color: Blue to blue-violet
- Crystal Habit: As poorly developed crystals
- Twinning: Commonly twinned on {110} and {310}
- Cleavage: {100}, imperfect; parting on {001}
- Luster: Vitreous
- Diaphaneity: Transparent to translucent
Associated Minerals
- Cordierite
- Garnet
- Almandine
- Spinel
- Hercynite
- Sillimanite
- Andalusite
- Quartz
- Feldspar