beryl

Etymology

Inherited from Middle English beryl, from Old French beril, from Latin bērillus, bēryllus, from Ancient Greek βήρυλλος (bḗrullos, “beryl”), from Prakrit, from Sanskrit वैडूर्य (vaiḍūrya).

noun

1. (uncountable, mineralogy) A mineral of pegmatite deposits, often used as a gemstone.
   Although there are dozens of different types of gems, among the best known and most important are diamond, ruby and sapphire, emerald and other gem forms of the mineral beryl, chrysoberyl, tanzanite, tsavorite, topaz and jade. 2012-03, Lee A. Groat, “Gemstones”, in American Scientist, volume 100, number 2, archived from the original on 2012-06-14, page 128
2. (countable) An example (a stone) of the mineral beryl.
   The crown was set with six beryls of excellent size and color.
3. (uncountable) A dull blueish green colour.
   beryl:

adj

1. Of a dull bluish green colour.