Crystopedia
Fossil Healing crystal

Petoskey stone

Type of fossil.

BlackGray

Petoskey stone specimen
Petoskey stone Hexagonaria percarinata 2.jpg · Wikimedia Commons (see file page for author & license)

🦴 Fossil facts

AgeDevonian, about 350–400 million years ago
Origin & sourcesNorthern Lower Michigan, especially the Petoskey, Charlevoix and Traverse City beaches of Lake Michigan. It is Michigan's state stone.
CompositionCalcite-replaced colonial coral (Hexagonaria percarinata)

How it forms

Colonies of Hexagonaria coral grew in a warm, shallow Devonian sea covering Michigan. Glaciers later plucked fossil-bearing rock and scattered it along the Great Lakes shores. The hexagonal pattern shows best when wet or polished.

🌍 Where it's found

  • Type locality
  • Notable source / deposit
  • Country of origin

Marker positions are approximate (region or locality level). Type localities from Wikidata; notable sources curated by Crystopedia.

✨ Metaphysical & Folklore

These are traditional and folk beliefs from crystal lore. They are not scientific or medical claims – crystals are not a substitute for professional care.

Michigan's state stone is fossil Hexagonaria coral from a Devonian sea; it is associated with patience, renewal and connection to ancient waters.

Traditional uses
patience, renewal, connection to nature
Chakra
Root Third Eye
Zodiac
Cancer, Pisces
Element
Water, Earth

💞 Pairs well with (traditional pairings)

Fossil CoralFellow ancient coral, kept together for patience and roots. CrinoidBoth carry the lore of old Devonian seas. AmmoniteFossil partners for perspective and life's long cycles. Petrified WoodTime stones paired for grounding and calm endurance. Smoky QuartzAdds steady grounding to a lake-shore stone.

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