Elvanite

Part of speech: noun

Definitions

1. A rare mineral composed of hydrated sodium aluminum silicate, typically found in igneous or metamorphic rocks
2. Its crystalline structure may exhibit various colors and is of interest in geological studies
3. Often studied for its potential industrial applications and as a geological specimen of curiosity

Etymology: Elvanite is a geological term for a rock, and its name grows out of an older one. "Elvan" was a word used by Cornish miners and quarrymen for a dense, hard, pale rock that often cut through granite and tin-bearing ground, and the mineral-naming suffix "-ite" was added to it to form a name for a specific rock type. The pairing is typical of nineteenth-century geology, when rock and mineral names were built on local or workmen's vocabulary and then given the Greek-derived "-ite" ending that signalled a formal category. The result is a word that carries the regional vocabulary of mining into the language of scientific classification. Its usefulness lies in a rock whose hardness and composition made it of interest for building and industrial purposes, which is why it has been examined beyond the collector's cabinet.