muscovite, common mica, isinglass or potash mica, a silicate mineral

above alternative background basal black brown cleavage close closeup common crystal elastic filler fireproofing from geology glass gleam glimmer glint gray insulating isinglass isolated layers lubricant macro material mica mineral mineralogy muscovite photo phyllosilicate plates potash reflective science sheet sheets shimmer silicate silver silvery studio tinted top translucent transparent view