Pearceite from Uchucchacua Mine, Lima, Peru - image 1

Pearceite from Uchucchacua Mine, Lima, Peru

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The Pearcite-Polybasite Group of silver copper sulphosalts of arsenic and antimony is a complex one, and has been made all the more technical with recent revisions. What was formerly called Arsenpolybasite was split into two polytypes: Arsenpolybasite-221 and Arsenpolybasite-222. These have subsequently been renamed respectively as Pearceite-T2ac and Pearceite-M2a2b2c. The 'Arsenopolybasite' crystals from Uchucchacua mine in Peru are now defined as Pearceite-T2ac. This large miniature specimen is a colossus of Pearceite-T2ac, as an aggregate of enormous (5.9 cm wide) thin pseudohexagonal dark grey crystals alligned parallel to form a much larger hexagonal mass. Embedded within this is a dark red crystal of Proustite. The enormity of this Pearceite-T2ac crystal/crystal aggregate is staggering. The outline of the crystal is remarkably good, considering its huge size, and you would have to visit many major museums to fine a specimen equal in importance to this. Ex Professor Werner Paar collection - from his remarkable rare species suite.

Product details

SpeciesPearceite
SizeSmall Cabinet
Dimensions5.3 x 5.9 x 3.9 cm
Added on10/24/2024

Current owner

Unknown Owner
Acquired
Jul 2026
Price paid
$8,500.00

Previous owners

DateCollectorAcquisition price
—Crystal ClassicsNot disclosed

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Pearceite
Mineral guide
Learn about Pearceite
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Pearceite
Regional guide
Pearceite from Uchucchacua Mine
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Locality guide
Uchucchacua Mine
A collector's guide to Uchucchacua Mine, Peru: its geology, mining history and notable minerals, illustrated with the 262 specimens documented from this locality on EarthWonders.