It must be noted that this is fundamentally different from a marbleized or crystallized effect achieved through using different colored glazes. While no less beautiful, in that process colored glazes are applied to an existing, already fired, body of a single earth ceramic – similar to the idea of “painting” on a blank canvas. This is opposed to mixed earth ceramics, like from Pichon and Apt, in which the ceramic itself is made up of different types of earth. When you consider that each of the earths has a unique firing temperature, and the difficulty involved in successfully firing a whole piece, it is remarkable. An easy way to tell whether or not a ceramic is mixed earth is to examine any two sides of one section: if it is mixed earth, the interior and the exterior will both show the different earths, versus only the decorative glazing on the outside.