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