Smoky Quartz is a type of Quartz that gets it's black and/or smoky color from natural radiation (in reference to the proximity of other radioactive minerals) or natural irradiation.
Black Mica, also known as Biotite, is a phyllosilicate mineral within the mica family. It typically forms in scales or layers, resembling books or parallel sheets stacked together. The coloring is black or dark green.
