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Sphalerite with Chalcopyrite

specimen number:

Swalley Mine, Baxter Springs, Tri-State District, Kansas, USA

Lustrous black twin crystals of sphalerite to 3.0 cm in size forming a cluster without matrix. Epitaxial chalcopyrite to 0.2 cm in size scattered throughout. Minimal micro-chipping present.

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Size: 5.0 x 4.5 x 4.0 cm (miniature)


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