4 Vintage Cork Back Coaster Stones with Various Shell Motif by Florida Artist Paul Brent. Cork Back Protects Furniture From Scratches. I’m Unsure of the Shell Types. Maybe Conch, Nautilus, Pink Coquille? & Unknown. Great Preowned Condition. Has a Few Stains Around the Edge That Are Hard to Distinguish From the Pattern Itself. One Spot on Shell, See Last Picture. Size 4” Diameter