Clay, Terracotta and Ceramic

potter's earth, potter's clay, clay, secondary clay, argil, adobe, porcelain clay, refractory clay, lean clay, marl, kaolin, slip, engobe, china clay, calcareous clay, pegmatite , pipe clay china stone, petuntze, Cornish stone, silica, feldspar, flint, flint pebbles,  gypsum, bone ash.

Usable Stones

soap stone, sand stone, marvel, granite, mosaic marvel and  alabaster