Historical Marker
De Zwaan Windmill
Historical marker location:
1 Lincoln Ave, Holland, Michigan
( Marker can be reached from Lincoln Avenue when traveling north.)
Marker installed: 2017
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.