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Chrysocolla Psm Boleite

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QRI683410

Chrysocolla Psm Boleite

Denver show 2018

Description Tabs

Description
Locality: 
Amelia Mine, Boleo, Baja California Sur, Mexico
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2.6 × 2.2 × 1.7 cm
Largest Crystal: 
0.15cm
Description

One of the most intriguing things I picked up in Denver this year was a limited batch of chrysocolla pseudomorphing boleite cubes.
The specimen in auction is a chrysocolla crust hosting a vug where the pseudomorphed cubes are well coated by multiple layers of alternating white, blue and green chrysocolla. The cubes are intensively replaced, but a couple of cubes are clearly discernible.
Quite unusual, this is really scarce material. I had heard of it but never seen them in person until very recently.

Mineral Data
What's on the rock

Chrysocolla

Formula: 
Cu2-xAlx(H2-xSi2O5)(OH)4·nH2O (x < 1)
Strunz: 
9.ED.20
Crystal System: 
Monoclinic
Hardness: 
2.5 - 3.5

Boleite

Formula: 
KPb26Ag9Cu24(OH)48Cl62
Strunz: 
3.DB.15
Crystal System: 
Isometric
Hardness: 
3.0 - 3.5
Type Locality: 
Santa Rosalía (El Boleo), Boleo District, Mun. de Mulegé, Baja California Sur (BC Sur), Mexico

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