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Identity HelpBrochantite from Morenci??

17th Nov 2016 17:41 UTCAlex Homenuke 🌟 Expert

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Do any of you Arizona experts recognize this specimen? It was labelled malachite from Bisbee, but I suspect it is Brochantite, probably from Morenci. It does not fizz in HCl, hardness 3+, mostly bladed but some blades are bundled acicular.

The matrix is a brecciated felsic volcanic rock. There is a trace of native copper at the base of a few blades.


18th Nov 2016 00:06 UTCMark Heintzelman 🌟 Expert

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I don't disagree with the idea that it's more likely Brochantite, but it looks more similar to samples I've seen from the Silverbell than from Morenci, considering the matrix (other may have a differing opinion on this). Bisbee certainly produced better specimens than either of the others mentioned. If you feel you can't trust the locality information either, it may be very hard to pin down where it did actually come from. Maybe someone here better accustomed to Bisbiee specific material can chime in with their opinion on that first.


MRH



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