Rhodochrosite. Transparent red crystals are rare; rhodochrosite is usually found in an aggregate form with alternating light and dark stripes in zigzag bands, somewhat similar in that respect to malachite or agate. The most common colors are light red and pink and it displays a vitreous luster when polished.It most commonly forms in hydrothermal veins associated with silver, copper, and lead sulfides. Some rare large red crystals have been found at the famous Sweet Home Mine near Alma, Colorado.
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