JIC Gem Natural Sliced Dyed Agate Coaster with Rubber Bumper Set of 4 (Q.1 Teal, 3.5-4") Hand select quality Agate Coaster Set of 4 with FREE Rubber Bumpers to protect your furniture. Sizes: 3.5-4". Dyed Teal Color. If the drinks and wine are sprinkled on the coaster, Chemical reactions can cause fading,please dry it in time to avoid fading to your beautiful furniture . You will receive similar products & colors as photos shown, natural agate makes each one is an unique collection. Can be used for ornaments, watch, Wine cup mats. A good present for your family and friends. These look terrific at the bar, pool side, or elegant table setting . Formed when silica-laden groundwater passes through air pockets in cooling lava, agate is an exceptionally unique mineral that was once thought to protect its owners from danger and even produce delightful dreams.