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• Photo title: Chalcanthite ore on white background, also known as copper sulphate is a richly colored blue/green water-soluble sulfate mineral
• Author: Mohaeljawphoto

• Cover photo description:
• As chalcanthite is a copper mineral, it can be used as an ore of copper. However, its ready solubility in water means that it tends to crystallize, dissolve, and recrystallize as crusts over any mine surface in more humid regions. Therefore, chalcanthite is only found in the most arid regions in sufficiently large quantities for use as an ore. Secondarily, chalcanthite, due to its rich color and beautiful crystals, is a sought after collector`s mineral. However, as with its viability as an ore, the solubility of the mineral causes significant problems. First, the mineral readily absorbs and releases its water content, which, over time, leads to a disintegration of the crystal structure, destroying even the finest specimens. It is critical to store specimens properly to limit exposure to humidity. Second, higher quality crystals can be easily grown synthetically, and, as such, there is a concern that disreputable mineral dealers would present a sample as natural when it is not.

• Image ID:128930824
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