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A Petoskey stone ( pə-TOSS-kee) is a collectible rock composed of the fossilized rugose coral, Hexagonaria percarinata. It is usually found pebble-shaped; such stones were formed as a result of glaciation, in which sheets of ice plucked the fossilized corals from the bedrock,…
A Petoskey stone ( pə-TOSS-kee) is a collectible rock composed of the fossilized rugose coral, Hexagonaria percarinata. It is usually found pebble-shaped; such stones were formed as a result of glaciation, in which sheets of ice plucked the fossilized corals from the bedrock,…
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