Assertion: chalcedony | /r/CapableOf | dye green
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text: Three well known examples of dyed chalcedony are aniline-dyed red chalcedony, which is marketed as coralline; chalcedony dyed green and marketed as emeraldine; and chalcedony dyed black and marketed as a substitute for black gemstones such as jet, "onyx" and even black pearls.