[MSPatton]

Taken from Britannia online.....
ceramic materials that are derived from common, naturally occurring raw materials such as clay minerals and quartz sand. Through industrial processes that have been practiced in some form for centuries, these materials are made into such familiar products as china tableware, clay brick and tile, industrial abrasives and refractory linings, and portland cement.

Taken from Websters........
of or relating to the manufacture of any product (as earthenware, porcelain, or brick) made essentially from a nonmetallic mineral (as clay) by firing at a high temperature; also : of or relating to such a product

With these definitions in mind, both Chipco and NJ composites would be considered "ceramic" as neither has man made materials such as plastic in their composition.