Because while the mineral is found worldwide, large red crystals of rhodochrosite are only found in a few places on Earth, the largest one known to have been found in the Sweet Home Mine near Alma, Colorado
Colorado's State Mineral is rhodochrosite.
Calcite belongs to the carbonates.
There is not one
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Many minerals are pink, eg: calcite, fluorite, rhodonite, rhodochrosite, sapphire, spinel, etc.
There isn't any official "state gun".
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The mineral dolomite is classified as a carbonate mineral. Other carbonate minerals include calcite, smithsomite, rhodochrosite, cerussite, ankerite, azurite, and malachite.
A rhodochrosite is a rose-colored mineral. Rhodochrosites can also be found in shades of pink to pale brown. Some are also streaked with white.
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