One of the mysteries of the English language finally explained.
In full "polyphant stone". A kind of Cornish potstone, greenish-grey in colour.
Mid 19th century; earliest use found in Scientific American. From Polyphant (formerly Pollaphant), the name of a village in Cornwall, England, between Bodmin and Launceston, where the main quarry is located.
In this article we explore how to impress employers with a spot-on CV.