Helen Starkweather

Historical marker location:

219 North Main Street, Romeo, Michigan

( Marker is on North Main Street north of West St. Clair Street, on the left when traveling north.)

1903 - 1987.

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.