In context|geology|lang=en terms the difference between rock and aphanite
is that
rock is (geology) any natural material with a distinctive composition of minerals while
aphanite is (geology) certain dark igneous rocks having grain so fine that the individual crystals cannot be seen with the naked eye.
As nouns the difference between rock and aphanite
is that
rock is (uncountable) the naturally occurring aggregate of solid mineral matter that constitutes a significant part of the earth's crust or
rock can be an act of rocking or
rock can be a style of music characterized by basic drum-beat, generally riffs, based on (usually electric) guitar, bass guitar, drums and vocals or
rock can be (countable) distaff or
rock can be (mythical bird) while
aphanite is (geology) certain dark igneous rocks having grain so fine that the individual crystals cannot be seen with the naked eye.
As a verb rock
is (transitive|and|intransitive) to move gently back and forth or
rock can be to play, perform, or enjoy rock music, especially with a lot of skill or energy.