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This is the most common type of clay. Terra-cotta is one type of earthenware that is relatively coarse and red in color. Other earthenware bodies may be finer and have various colors, ranging from white to gray, buff and red. Earthenware clays are usually fired between 1700o F (927o C) - 2100o F (1150o C). At this temperature the clay body is still porous and needs to be glazed, e.g. if it is to be used as dinnerware.