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I-Biotite (i-black mica)
I-Biotite ivela kakhulu emadwaleni e-metamorphic, i-granite namanye amadwala.Umbala we-biotite usuka komnyama uye ensundu noma oluhlaza, onengilazi ecwebezelayo.Umumo uyipuleti nekholomu.Eminyakeni yamuva nje, i-biotite isetshenziswe kabanzi ekupendeni kwamatshe nezinye izigqoko zokuhlobisa.
