2.9" Polished Slab Petoskey Stone Hexagonaria Coral Fossil Devonian Age Michigan Strombus indicating formation from settling crystals

indicating formation from settling crystals in molten magma

developing more intricate shell designs and complex suture patterns that enhanced buoyancy and structural strength

often with an additional component of black hornblende

Lived in the Miocene Age

Their large size suggests they played a crucial role as primary herbivores

2.9" Polished Slab Petoskey Stone Hexagonaria Coral Fossil Devonian Age Michigan Strombus indicating formation from settling crystalsLocation: Michigan, United States Weight: 0. 8 Ounces Dimensions: 2. 9 Inches Long, 1. 3 Inches Wide, 0. 2 Inches Thick The item pictured is the one you will receive. Devonian Age, 350 million years old Petoskey Stone is a unique rock and fossil, specifically a fossilized rugose coral known as Hexagonaria percarinata. These stones are typically pebble shaped and are found primarily in the northwestern and northeastern regions of Michigan's Lower