2.6" Polished Slab Petoskey Stone Hexagonaria Coral Fossil Devonian Age Michigan

Location: Michigan, United States Weight: 1.9 Ounces    Dimensions: 2.6 Inches Long, 1.6 Inches Wide, 0.5 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 Peninsula. They are fragments of a coral reef that existed during the Devonian period, approximately 350 million years ago. Petoskey stones were formed through glaciation, where ice sheets plucked stones from the bedrock, grinding off their rough edges and depositing them in specific areas.  When dry, they resemble ordinary limestone, but when wet or polished, they reveal a distinctive mottled pattern of six-sided coral fossils. The Hexagonaria percarinata consists of tightly packed, six-sided corallites, which are the skeletons of the once-li