Atacamite

Unknown Owner

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A large, showy specimen from the type locality for this important collectible copper species, with many areas of beautiful, intense deep green crystals flatlaying on the matrix (on both sides). From the noted collection of TB Wilson, whom according to the Mineralogical Record Archive on him joined the Academy of Natural Sciences in Philadelphia in 1832, and was the Academy's principal benefactor. His collection was donated upon his death in 1865.