The state rock of Pennsylvania is the trilobite.
Actually, the trilobite is the state FOSSIL of Pennsylvania. PA does not have a state rock or a state mineral yet, though suggestions have been made.
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It has no official state rock, stone, gem or mineral.
Salem limestone is the official state stone of Indiana.
what is another name for a small rock not a pebble not a stone
"Red stone" does not exist.
Stone
its a rock but it has certain characteristics of magical minerals