Dims: 8.7x5.6x2.2" (22.2x14.2x5.6cm)
Wt: 31 oz. (877g)
Aztec Mine, Santa Cruz County, Arizona, USA
Its too bad that chalcanthite is water soluable and extremely fragile, because specimens such as this are very beautiful. Dozens of clusters of deep blue, transparent, silky chalcanthite crystals contrast nicely against the off-white to light brown host rock. Under a loupe, the crystals look even better, because they have excellent clarity and that wonderful blue color. To the naked eye, the clarity is obscured by the silky appearance of the clusters of fine crystals, although that is a pleasing optical effect. Specimens such as this should be stored in a controlled humidity container (preferably dry), as cycles of humidity changes will eventually break down the crystals.