Celadon certainly looks great on stoneware, but it is clearly at its best when fired onto a white colored or porcelain body.
NOTE: It is possible with modern ceramics technology to produce the celadon looking color and surfaces at lower firing temperatures and even without reduction firing using commercial glaze stain colorants. Lacking technical testing equipment most people would have a hard time telling these pieces from ones fired in the traditional manner.
Is this really "celadon". How many angels can dance on the head of a pin?

best,
............john