Citrine is the name of a deep rich golden yellow. It has been a color name in English since the 14th century (and it was the name for the same color in Medieval Latin—and before that in classical Latin). The word “citrine” also describes a gemstone which consists of yellow colored quartz crystal. Citrines are a semi-precious stone today, but they were once valuable and they can be found in various ancient crowns and classical jewelry. The word originally came from the deep yellow color of the citron, the wild ancestor of the lemon (which is a sacred fruit of the Old Testament), and because it is so descriptive of rich yellow it is used for the English name of numerous different birds and other creatures (like the citrine forktail below).