4.2" Polished Slab Petoskey Stone Hexagonaria Coral Fossil Devonian Age Michigan Rebbachisaurus Tooth They represent the earliest vertebrates

They represent the earliest vertebrates capable of powered flight

These regions typically feature geological formations conducive to the oxidation of copper ores

15 Inches Thick

vertically oriented shells

4.2" Polished Slab Petoskey Stone Hexagonaria Coral Fossil Devonian Age Michigan Rebbachisaurus Tooth They represent the earliest vertebratesLocation: Michigan, United States Weight: 2. 4 Ounces Dimensions: 4. 2 Inches Long, 1. 7 Inches Wide, 0. 3 Inches Thick The item pictured is the one you will receive. Devonian Age, 350 million years old Petoskey Stones are unique rocks and fossils, specifically fossilized rugose coral known as Hexagonaria percarinata. Typically pebble shaped, these stones are found primarily in the northwestern and northeastern regions of Michigan's Lower Peninsula.