When did this concept come about, and where did it originate from?
Not mica is any rock that isn't mica. A typical example it smoky quartz. Not smoky quartz is any rock that isn't smoky quartz. A typical example is mica. .
why 2nd? anyhow, in spite of the reality that my likings and short-term evaluations are continuously changin, top now a number of my favorites are... as i lay dying, kalmah, dragonforce, dream evil, and firewind are quite incredible too.