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.
1 Golden Citrine-Citrine with a golden yellow color. 2  Lemon Quartz-Lemon Quartz is a light to dark yellow Citrine, distinguished from most Citrine by lacking orange, brown, or reddish tints. 3  More often though it is clear Quartz that is irradiated to produce an intensely colored yellow gemstone.