The tumbled marble coasters have distressed edges and corners and a matte (stone-like) finish. Each coaster will be different in color, veining and surface pitting.
It is normal to have corners that are chipped and ragged and some can be very distressed. It is also normal for some of the natural veining and shade variations of the product to show through the mural image. All these characteristics are what give the tumbled marble stone its appeal.