White clay is won from 5 pits operated by 3 companies for use in white cement and cream brick manufacture with some as a filler / extender. White clay formed by intensive kaolinization of mica schist and fine grained micaceous quartzite. Irregular bodies of high grade, white (kaolin) clay (greater than 90% kaolinite) are found with sandy and iron stained clay in a 30 metre thick white clay unit below pale, clean quartzite. High grade kaolin formed by alteration of pyrite rich, biotite schist under acidic conditions in areas of low quartz content and high groundwater movement. For part of the deposit held by Adelaide Brighton Cement Ltd., auger drilling indicated reserves of 740 000 tonnes of kaolin, but will require selective mining and blending. Assessment of processing costs and potential markets outside existing uses are recommended.