Deer Isle Granite - StoneContactHelp Center · logo. Home · Products · Suppliers · Stone Library · Price Lists · Quarries · Buying Requests · Stone Fairs · Magazines. Products. Products; Suppliers.deer isle granite quarry,Directions and hours (summer only) | Deer Isle Granite MuseumStonington is a picturesque fishing town at the southern tip of Deer Isle. . Crotch Island, site of the granite quarry, is visible to the southwest across Stonington.