Resin Bonded Cerium Oxide Sanding Polishing Product,They are an excellent choice for polishing gemstones such as agate, jasper and hard silicated stones as well as optical glass,The Cerium Oxide polishing was a messy process involving slurry and the cleanup and filtration issues related to slurry use.Hans Diamond Cerium Products such as cerium oxide sanding pads,eliminate the waste while providing a long lasting and durable solution to industrial and lapidary polishing. The cloth backing provides a stong, flexible base for the resin bonded cerium, while resisting heat deformation caused by the heat generated by the very aggressive cerium media.