Job 28:4-6

Amplified Bible

⁴ 
“He breaks open (mine) shafts far away from where people live,
[In places] forgotten by the [human] foot;
They dangle [in the mines] and hang away from men.
⁵ 
“[As for] the earth, out of it comes food,
But underneath [its surface, down deep] it is turned over as fire.
⁶ 
“Its stones are the bed of sapphires;
It holds dust of gold.