Rocks that are rich in kaolinite are known as kaolin or china clay. And among other things, some bricks are made from clay. There are 2 clay products on the DLS, Kaolin pulver & Kaolin slurry. If you have a paper making plant you are going to need kaolin, also used in paints, medicines, toothpaste. There was a thread a while back that had some information about clay, and there is a 1 or 2 board clay route on the DLS, I don't remember the author or name. Do a keyword "quarry" search on the DLS and I am sure you may find something that you can use.
John