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Hidalgoite

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SKY627845

Hidalgoite

Classic Locality

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Description
Locality: 
Tsumeb Mine, Otavi Highlands, Namibia
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
1.5 × 0.7 × 0.5 cm
Description

Hidalgoite is a rare Pb-Al arsenate-sulphate worldwide, but in Tsumeb it is extremely rare (labeled as RRR in Gebhard Tsumeb II book, that is. single occurrence with less than 10 specimens known).

It occurs in this specimen as yellow crystals/crystal aggregates (!) on matrix . Following Gebhard Tsumeb II book (p.287) referring to hidalgoite crystals: "Although small, they represent the best of the species, since hidalgoite crystals are virtually unknown". For this reason, this specimen is exceptional for the species !.

Don't miss the opportunity to get such a mineral in crystallized form.
Analyzed specimen (see copy). 

Mineral Data
What's on the rock

Hidalgoite

Formula: 
PbAl3(AsO4)(SO4)(OH)6
Strunz: 
8.BL.05
Hardness: 
4.5
Type Locality: 
San Pascual Mine (San Pasquale Mine), Zimapán, Mun. de Zimapán, Hidalgo, Mexico

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