I-Biotite (i-black mica)
Ingcaciso yeMveliso
Ikristale enye ye-biotite yi-columnar emfutshane kunye ne-plate-shaped, ene-hexagonal cross section kunye ne-scaly aggregate.Umdaka okanye omnyama.Umbala uba mnyama ngokunyuka komxholo wentsimbi.Ezinye iipropathi ezibonakalayo kunye nezomatshini zifana nezo ze-muscovite, kunye nobuninzi be-2.7-3.3.
Bhala umyalezo wakho apha kwaye uwuthumele kuthi