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how long does it take rhodochrosite to form?

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asked Oct 10, 2018 by mattie-be4 (160 points)

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That's an open ended questions. Depends on the habit, formation, and crystal size. For example the rhodochrosite from argentina forms over time from precipitating solution of manganese-rich water in cave environments, whereas other deposits such as the Sweet Home Mine in Colorado form in hydrothermal ore veins in a much different fashion.
answered Oct 18, 2018 by hershel (52,660 points)
selected Oct 18, 2018 by mattie-be4