by Liar
I like your writing, but this poem reads like it might have skipped the editor's desk.
"and nor all rock"
I might suggest "and not all rock" or "nor is all rock"
"at it's core"
"it's" should be "its"
"that hides"
"hides" wants to be "hide"
"tell me why
they should be"
Your last line ends in an ellipsis ("a rock" is understood.)
If you were to change "they" to something like "that" it might make a stronger/broader statement.