clay
soft rock based compound often used for sculpture and tools
boulder clay
deposit of clay, often full of boulders, formed from the ground moraine material of glaciers and ice-sheets
white pipe clay
white-firing clay of the sort that is used to fashion white smoking pipes
bole
fine clay of various colors, used as pigment and in the ground for gold leaf
blue clay
regional Lower Cambrian clay found in Estonia
ball clay
kaolinitic sedimentary clay
peloid
mud or clay used in therapeutic bathing
grog
type of ceramic
marine clay
type of clay found in coastal regions around the world
kaolin
clay rich in kaolinite
fire clay
range of refractory clays used in the manufacture of ceramics
Post-glacial clay
sedimentary clay layer or deposit