What is the origin of 'sleep tight'?
Read moreOne of the mysteries of the English language finally explained.
A greyish-black garnet usually regarded as a variety of andradite.
Early 19th century; earliest use found in Andrew Ure (1778–1857), chemist. From German Pyreneit from † Pyreneen, variant of Pyrenäen, the name of the Pyrenees + -it.