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Biology 21 Online
OpenStudy (anonymous):

What gives the gem amethyst its purplish color?

OpenStudy (anonymous):

Amethyst is a purple variety of quartz (SiO2) and owes its violet color to irradiation, iron impurities so its iron

OpenStudy (anonymous):

iron

OpenStudy (shrutipande9):

hi! welcome to openstudy! we here on openstudy try to segregate the subjects so that people get a better response...next time try posting this ques in chemistry for better answers..:)

OpenStudy (beccaboo333):

Welcome to OpenStudy.

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