A fine-grain stone produced from the decomposition of feldspathic granite native to England and Wales. Cornwall stone is very similar to petuntse. It contains quartz, mica, and fluorite and the powdered stone is considered an important addition to kaoli for the production of porcelain. It is also used in glazes.
Synonyms and Related Terms
Cornish stone; Cornwall clay
Sources Checked for Data in Record
- G.S.Brady, Materials Handbook, McGraw-Hill Book Co., New York, 1971 Comment: p. 316
- Ralph Mayer, A Dictionary of Art Terms and Techniques, Harper and Row Publishers, New York, 1969 (also 1945 printing)
- Michael McCann, Artist Beware, Watson-Guptill Publications, New York City, 1979