Derived from the Greek word meaning "copper flower," this brightly colored mineral is found in the late-stage oxidation zones of copper deposits. Chalcanthite is most known for its vibrant blue color, but it is also valued as a copper ore, although this can be problematic due to its solubility. In nature, chalcanthite often forms, dissolves, and then re-crystallizes, creating small clusters. These larger specimens have been lab-grown to protect the crystals from moisture that might break down their structure. Add a little blue to your foggy San Francisco day.

Keep chalcanthite away from moisture or direct sun.

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