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Arsendescloizite with Mimetite
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When we got this specimen back, in the purchase of the Trancoso collection of aesthetic species and classics, I recalled that it came to us in the first place in around 2003-4 as a highlight of the Martin Zinn collection of rare species. Marty is a well known collector who sold his first collection in 2003; and it featured heavily for both Mexican material and rare species. It remains as significant now as it did then when we wrote this same description - perhaps more so, as not other of such significance has turned up since, to my knowledge. This is an old find, and they simply are not on the market. With as many Mexican collectors as there are, they get snapped up when they do appear; and this is a display sized cabinet piece, as well. This large, rich specimen is surely one of the very best examples of its species from the small find, of about ten flats brought to Tucson in 1989. They were mined in 1988, according to the MR issue on the Ojuela Mine. Some pieces were sprinkled lightly with mimetite (much of it white), but this one has extraordinarily rich coverage of yellow mimetite and thus good color contrast that is lacking in the few others I have even seen for sale over the years. Note that the color here goes a bit stronger in LED (cooler, white) vs. room lighting (warmer, yellow). The specimen in the University of Arizona Mineral Museum, illustrated in that issue of the MR, is 17 cm compared to the 12 cm size here, but it lacks the aesthetics and contrast of this piece to my eye. In any case, most have long since disappeared into museums and collections. I have seen only two great pieces, including this one, for sale from 2000 to 2026 (including this one, now twice). Long in the collection of Dr. Vasco Trancoso (Lisbon).
Product details
SpeciesMimetite, Arsendescloizite
SizeCabinet
Dimensions11.4 x 8.7 x 5.4 cm
Listed on06/12/2026
LocalityMexico, Durango, Ojuela Mine
SKUSM26-005
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