INSPIRE
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chrysoprase

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chrysoprase
Definition:
A variety of chalcedony that contains small quantities of nickel. Its color is normally apple-green, but varies to deep green. The darker varieties of chrysoprase are also referred to as prase. (However, the term prase is also used to describe chlorite-included quartz, and to a certain extent is a color-descriptor, rather than a rigorously defined mineral variety.) - http://en.wikipedia.org/wiki/Chrysoprase
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