Black and white photograph from 1963 showing a view of the harbor at Grindstone City, Michigan, from the southwest pier. The back of the photograph reads: "Grindstone City, Huron County. On SW pier looking WWN at harbor. Harbor on grindstone rubble fill." The city was founded around the grindstone quarries, with its primary industry focused on this finest of abrasive stones. After World War I, carborundum replaced grindstone, destroying the industry of the town and the town itself. The city is also spelled Grind Stone City in some sources.