This set of four stone coasters is made using kaleidoscope collage images that I created from an Ernst Haeckle 1890 sea life illustration. Each coaster varies in design but is made using different sections of the illustrations, repeated in a kaleidoscope pattern.The images have been applied using a unique transfer process that allows the color and character of the stone to show through the lighter parts of the image. The images have been "melted" onto the top of the tiles, melding them into one. 100% handmade, the coasters have been well sealed for lots of use with both hot and cold beverages. They are fully backed in cork to protect your table surfaces.Each coaster measures approximately 4x4 inches square and is made using the finest tumbled marble.The coasters are not dishwasher safe but can be wiped clean with a damp cloth, as needed.