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Discover Michigan's prehistoric treasure - 350 million years of history transformed into stunning, wearable art.
The Petoskey stone is a fossil coral that lived approximately 350 million years ago during the Devonian period, when Michigan was located near the equator and covered by a warm, shallow tropical sea. The distinctive hexagonal pattern you see in these stones is actually the fossilized remains of Hexagonaria percarinata, a colonial rugose coral.
Each "eye" in the pattern represents an individual coral polyp - tiny soft-bodied animals that lived together in massive colonies, similar to modern coral reefs. When the corals died, their calcium carbonate skeletons were buried in sediment and slowly replaced by silica, preserving their intricate structure for hundreds of millions of years.
Today, these ancient treasures wash up along the shores of Lake Michigan and Lake Huron, gifts from the glaciers that carved the Great Lakes and scattered these fossils across northern Michigan. The name "Petoskey" comes from the Ottawa word meaning "rays of the rising sun" - a fitting description for the stone's radiating pattern.

Polished Petoskey stone showing the distinctive hexagonal coral pattern

Petoskey stones found along Michigan's Lake Michigan shoreline
Petoskey stones are fossilized colonies of Hexagonaria percarinata, a coral that lived during the Devonian period when Michigan was covered by a warm, shallow sea.
Officially designated as Michigan's state stone in 1965, the Petoskey stone is named after the city of Petoskey in northern Michigan.
The hexagonal 'eye' pattern you see is actually the fossilized remains of coral polyps - each 'eye' was once a living coral animal.
While similar fossils exist elsewhere, the specific Petoskey stone variety is found almost exclusively along Michigan's northern Lower Peninsula shorelines.
From everyday pieces to statement accessories, Petoskey stone makes stunning jewelry that connects you to millions of years of Michigan history.

Handcrafted Petoskey stone pendant showcasing the distinctive coral fossil pattern
The most popular way to wear Petoskey stone. Cabochon-cut pendants showcase the distinctive coral pattern beautifully.
Statement rings featuring polished Petoskey stone make unique conversation pieces and meaningful Michigan keepsakes.
From simple studs to elegant drops, Petoskey stone earrings add a touch of Michigan heritage to any outfit.
Beaded Petoskey bracelets or single stone cuff styles - perfect for everyday wear or special occasions.
Unique accessories for those who want to carry a piece of Michigan history with formal attire.
Beyond their natural beauty, many believe Petoskey stones carry powerful metaphysical properties rooted in their ancient origins.
Said to create a shield against negative energies and emotional harm
Believed to help process difficult emotions and past traumas
Associated with enhancing intuition and psychic awareness
Connects to ancient Earth energy, promoting stability and calm
To activate your Petoskey stone's energy, hold it during meditation while visualizing the ancient ocean from which it came. Many practitioners use it for past-life work or to connect with ancestral wisdom. Its water-origin energy pairs well with emotional healing practices.
Planning a stone hunting trip? These locations in northern Michigan are known for excellent Petoskey stone finds.
For a beautiful shine, polish with a soft cloth and a tiny amount of coconut oil. This enhances the coral pattern without damaging the stone.
Each Petoskey stone is unique - a one-of-a-kind fossil that's been waiting 350 million years to find its way to you.
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