One of the mysteries of the English language finally explained.
1Alchemy. The red form of the philosopher's stone. Now historical.
2Now usually in form redstone. Any of various rocks of a red colour, especially a sandstone or other reddish sedimentary rock suitable for use as a building stone.
Old English (in an earlier sense). From red + stone.
red stone/ˈrɛd ˌstəʊn/
In this article we explore how to impress employers with a spot-on CV.