This pattern was originally published as part of Spilly Jane Knits Mittens in 2015. It includes instructions for making both mittens and fingerless mittens in three different sizes.

Petoskey stones are the fossilized remains of ancient coral beds that have been tumbled by the waves of Lake Michigan for millions of years. The first time I saw one I couldn’t wait to see how its markings would translate into a mitten. Though the pattern has been necessarily simplified, the beauty of the fossils they emulate remains.