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coal is a valuble rock mined in Indiana
coal.
I think it might be coal I don't know for sure
Salem limestone is the official state stone of Indiana.
limestone
granite,limestone and slate
Permeable sedimentary rock
An ore is a rock that bears minerals containing valuable elements. Most rock can be considered to be an ore although the classification is usually reserved for rock that has sufficient concentrations of elements to make it worth mining and separating.
practically anywhere as it is present in high levels in most continental crustal rock.
A valuable rock is a gem.
you play minecraft
Diamond