A great reference if you are interested in the supply side of ceramic minerals. Many of the minerals dealt with in this report are ceramics-related. For example, did you know there are 160 companies mining clay in the US! They mine 4.5 million tons (mt) of bentonite, 6mt of kaolin, 1mt of ball clay, 11mt of common clay. What are the ton prices? Check for yourself.
USGS Mineral Commodity Report