All categories
Featured selections
Trade Assurance
Buyer Central
Help Center
Get the app
Become a supplier

About products and suppliers

Petoskey Stones: A Gemstone Enthusiast's Guide

Renowned for their unique patterns and historical significance, Petoskey stones are a fascinating subject for collectors and jewelry makers alike. These fossilized coral pieces, predominantly found in Michigan, USA, are not only aesthetically pleasing but also carry a rich geological backstory. This guide delves into the various aspects of Petoskey stones, from their natural form as petoskey stone unpolished to their more lustrous counterpart, the polished petoskey stone.

Understanding Petoskey Stones

Petoskey stones are a variety of fossilized coral, specifically Hexagonaria percarinata, which lived in the warm, shallow seas that covered Michigan during the Devonian period, about 350 million years ago. These stones are characterized by their distinctive hexagonal patterns, which become more pronounced when wet or polished. Collectors may find a range of variations, including the pink petoskey stone and the green petoskey stone, each offering a unique hue to this natural wonder.

The Diversity of Petoskey Stones

The allure of Petoskey stones extends beyond their typical gray or brown shades. The blue petoskey stone is a rarer find, sought after for its unusual coloration. For those interested in the textural and color variations of these stones, the petoskey stone coral type provides insight into the ancient coral beds that these stones originated from. Collectors and enthusiasts may also encounter large specimens, aptly named big petoskey stone or large petoskey stone, which are particularly prized for their display-worthy size and presence.

Applications and Craftsmanship

While Petoskey stones can be appreciated in their raw form as raw petoskey stone, they are often transformed through processes like tumbling. The rock tumbler petoskey stones method polishes these gems to reveal their hidden beauty, making them ideal for creating petoskey stone necklaces and other jewelry pieces. The art of tumbling petoskey stones is a meticulous one, gradually bringing out the stone's luster and pattern through repeated abrasion and polishing.

Collecting and Valuation

As with all gemstones, the valuation of Petoskey stones is influenced by several factors. The clarity of the stone's pattern, its overall condition, and color depth play significant roles. Collectors often seek out specimens like the petoskey stone fossil, which not only serve as beautiful ornaments but also as tangible connections to Earth's distant past. The intrinsic value of these stones may increase over time, making them a noteworthy consideration for those looking to expand their collections.


Petoskey stones, with their rich history and unique appearance, offer a captivating glimpse into the ancient world. Whether in the form of jewelry or as part of a geological collection, these stones are a testament to nature's artistry. As enthusiasts seek out the perfect piece, the journey from the unpolished to the polished, from the raw to the refined, is as rewarding as the treasures they uncover.