Malachite with Copper

Item Description

Malachite is not often seen from the Upper Peninsula of Michigan in good display specimens. This piece is a nice overall example featuring medium green to pale green colored Malachite coating the matrix, with minor Copper in spots. Essentially the Copper on this specimen oxidized into Malachite, leaving only a tiny bit of Copper remaining. If you collect minerals of the UP of Michigan or secondary copper minerals, this is a really worthwhile specimen for your collection. From the worldwide mineral collection of Albert Lewis Kidwell (January 1, 1919 - August 16, 2008). Al was a well-known mineral collector and research geologist with Carter Oil Company and later Exxon Oil Company in Houston, Texas. The phosphate species Kidwellite was named in his honor in 1974 ( https://www.mindat.org/photo-326405.html ).