Check the listing for details. 10pc Michigan Horn Coral Fossils (Rugosa) - Natural Devonian Fossils 12oz. Condition: New. Listed at 12.95 USD. 10pc Michigan Horn Coral (Rugosa) Fossils You will receive the beautiful rocks pictured above.Unpolished and Natural, smoothed by the Michigan Great Lakes.Wet & Dry pictures of both sides are shown.Size: see photosTotal Weight: 12 oz.These 350 million year old fossils (Devonian Period) were collected in what seems to have been part of an ancient pinnacle reef or glacier moraine.If you choose, these stones can be hand sanded and polished easily with wet/dry automotive sandpaper using... #200, #300, #400, #600, and #1200 grit.BUY MORE -- SAVE MORE We have a large selection of quality Michigan Rocks & Fossils. Just click "Add to Cart" button to SAVE 10% off 2+ items in the same order! PLUS, get a combined shipping discount! Click the Rocks & Fossils category on the left or Visit Store to see our selection! Fast Shipping! Many orders ship same day! Buy with Confidence -- Seller for Over 20 Years and Top Rated!