Evelyn S

Historical marker location:

268 Black River Street, South Haven, Michigan

( Marker is on Black River Street, 0.1 miles south of Dyckman Avenue, on the left when traveling south.)

A Long History.

Michigan is the only state to have two designated "state stones": the Petoskey Stone, which is the state stone of Michigan, and the Isle Royale Greenstone, which is the state gemstone of Michigan. The Petoskey Stone is a fossilized coral that is found primarily in the northern Lower Peninsula, while the Isle Royale Greenstone is a rare mineral found only on Isle Royale in Lake Superior.