China clay and Refractory clay

China clay noun - A fine usually white clay formed by the weathering of aluminous minerals (as feldspar); used in ceramics and as an absorbent and as a filler (e.g., in paper).

Refractory clay and china clay are semantically related in clay for making pottery topic. In some cases you can use "Refractory clay" instead a noun phrase "China clay".

China clay and refractory clay are semantically related in clay for making pottery topic. You can use "China clay" instead a noun phrase "Refractory clay".