In a computer language, a reserved word is a word that cannot be used as an identifier, such as the name of a variable, function, or label â it is reserved from use. This is a syntactic definition, and a reserved word may have no meaning. A closely related and often conflated notion is a keyword, which is a word with special meaning in a particular context. This is a semantic definition. By contrast, names in a standard library but not built into the language are not considered reserved ...
Document status: complete. Citrine is a transparent, yellow macrocrystalline quartz variety. Natural citrine is very rare, in fact almost all the material offered on the market under that name is not natural citrine, but heat treated amethyst.
Citrine has been used ornamentally for thousands of years. In fact, in Ancient Greece, the stone was used as a decorative gem during the Hellenistic Age between 300 and 150 B.C. In addition, 17th century Scottish men used citrine on the handles of daggers and swords for decorative purposes. However, there is also record of entire sword handles that were crafted from citrine.