Bisqueware Tiles they range from 2" to 5" in size.
You get Farmer and Cactus Southwest
These can easily be painted with acrylic paints and sealed for a one of a kind look, can be glazed and fired, stained, etc. The possibilities are endless. I use these all the time in my art and these are perfect for , altered art, mosaics, magnets, or whatever else you can dream up.