This is a set of 4 Agate slices that have a variety of uses. Perfect as a powerful altar tile or impress your next guest by using them as coasters! Set of four come in a variety of colors, sizes and inclusions. Each tile is unique and comes with adhesive buttons to put on the bottom to protect your Agate and surface. Approximately 4" wide with varying colors of black, blue, red, orange and more. From Brazil