I wrote this poem, but ain´t sure if it´s correct or ¨good¨. Please help.

Rainbows In The Stone
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Untouched by light
A hidden dark void
Cast within rocks
Its mysteries many avoid

Hiding within the rough rock
Hides a wonder untold
Though stony and damp
A treasure as much as gold

Hiding in the dark
A beauty locked in place
But given upon the light
Reveals a beautiful elegant grace

Shining under light
Rainbows in the stone
The jewels of Mother Nature
Their beauty finally shown