Johannsenite, Sphalerite

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Johannsenite is a rare pyroxene group silicate and this excellent, combination specimen features a very rich coverage of sprays of black to brown to olive green johannsenite needles on the 3-dimensional matrix. A fine bonus are the two, very well-placed, gem, olive-green sphalerite crystals to 1.1 cm. This piece is from the Iron Cap Mine of Arizona. Ex. J.H. Marshall Collection.