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what kind of surface stones might contain amythyst

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asked Aug 10, 2017 by charles dollar (120 points)

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Amethyst is simply purple quartz. Quartz is a silica based rock, meaning SiO2. Most prevalent substance on earth. Could be any rock. It could be in any metamorphic rock. It can seep into fissures in sedimentary rock. SiO2 in solution can seep into fissures and form quartz, agate, amethyst...

answered Aug 11, 2017 by Weasel (51,130 points)

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