4 - 4 x 4 handmadeTravertine Tumbled Stone
Cork on back to protect furniture
Protective Sealer so coasters can be used for hot or cold
These coasters are not dishwasher safe. Coasters should be cleaned by wiping with a damp cloth. 
Tumbled Stone, therefore, coasters can vary with texture and/or color due to natural stone. Each coaster has its own "distinctive look"