The stone was named for an Ottawa chief, Chief Pet-O-Sega, son of a French fur trader and Ottawa mother. The city of Petoskey, Michigan, is also named after him, and is the center of …

Petosky stone is a fossil rock formed from the remains of the rugose coral Hexagonaria percarinata. These corals are believed to have existed before the dinosaurs and thrived during …

May 14, 2025 · Petoskey stones are popular Lake Michigan beach finds. In rough natural form, they are a piece of Hexagonaria coral. Learn how they form and how to find them.

Nov 13, 2023 · Petoskey Stone is a fossilized coral, specifically a type of colonial coral known as Hexagonaria percarinata. The stone gets its name from the city of Petoskey in Michigan, …

Petoskey stone is a fossilized coral. It's a unique rock found in Michigan and is Michigan's official state stone. The coral it's made from is called Hexagonaria percarinata and lived in a warm, …

Petoskey stones are fossilized corals belonging to the genus Hexagonaria. These corals thrived in shallow waters during the Devonian period, approximately 350 million years ago.

Michigan’s state stone, the Petoskey stone, is a rock and fossil that is composed of a fossilized rugose coral combined mostly with calcite. Rugose coral were found to have been both solitary …

What is a Petoskey Stone? A Petoskey Stone is, at its core, a fossilized coral, specifically Hexagonaria pericallosa. It comes from an ancient coral reef that thrived in the warm, shallow …

Almost a century after the founding of Petoskey, on June 28, 1965, Governor George Romney signed a bill that made the Petoskey Stone Michigan's official State Stone.

The prehistoric fossil, unique to the Traverse Group rock strata, is called the Petoskey Stone and is Michigan’s official state stone. A Petoskey Stone consists of tightly packed, six-sided …