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.
Natural citrine is actually quite rare and because it is more valuable than most other varieties of quartz, much of the citrine today is actually heat-treated to obtain its attractive golden color.Almost all heated citrine will exhibit reddish tints.lthough citrine deposits can be found all around the world, Brazil is the world's leading supplier. Other notable sources include Argentina, Bolivia, France, Madagascar, Myanmar (Burma), Namibia, Russia, Scotland, Spain, Uruguay and Zambia.