Changing Retail Patterns

Historical marker location:

223 South Main Street, Ann Arbor, Michigan

( Marker is at the intersection of East Liberty Street and South Main Street, on the left when traveling east on East Liberty Street.)

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.