IMPORTANT: These coasters are all hand-made originals, therefor no two are exactly alike. 

Acid oxidized on heavy gauge copper using a 10-day, 42-step process. The copper sits on 3/8" slate and is sealed with multiple layers of commercial-grade bar top epoxy. This stops any further oxidation and protects your artwork for future generations. Rubber feet protect your surfaces from abrasions. These weigh almost a pound each!