This product is a polished fossilized horn coral rugose coral from Michigan, weighing 1 ounce and measuring 1.5 inches in size. The polished finish gives it a smooth and shiny appearance, making it a unique and visually appealing piece for collectors of rocks, fossils, and minerals. The fossilized nature of the coral adds to its intrigue, as it represents ancient marine life that has been preserved over time. Perfect for those interested in adding a piece of natural history to their collection.