Galena, Sphalerite

Unknown Owner

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A starkly isolated, flat, complete spinel-twinned galena crystal, standing up off a cluster of shiny sphalerites. Buried amongst the sphalerites are some galena crystals of an entirely different (more traditional) form! It is so curious how this can happen..the conditions that cause the galenas to form in two entirely different ways, right on the same specimen! 5.3 x 4.4 x 4.1cm