Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
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Allophane from
El Dragón mine, Porco Municipality, Antonio Quijarro Province, Potosí, Bolivia


09357820017638326568328.jpg
Allophane, etc.

El Dragón mine, Porco Municipality, Antonio Quijarro Province, Potosí, Bolivia
08474000017360815621624.jpg
Allophane, etc.

El Dragón mine, Porco Municipality, Antonio Quijarro Province, Potosí, Bolivia
09357820017638326568328.jpg
Allophane, etc.

El Dragón mine, Porco Municipality, Antonio Quijarro Province, Potosí, Bolivia
08474000017360815621624.jpg
Allophane, etc.

El Dragón mine, Porco Municipality, Antonio Quijarro Province, Potosí, Bolivia
09357820017638326568328.jpg
Allophane, etc.

El Dragón mine, Porco Municipality, Antonio Quijarro Province, Potosí, Bolivia
08474000017360815621624.jpg
Allophane, etc.

El Dragón mine, Porco Municipality, Antonio Quijarro Province, Potosí, Bolivia
Locality type:Mine
Classification
Species:Allophane
Formula:(Al2O3)(SiO2)1.3-2 · 2.5-3H2O
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Kruťaite4
Goethite2
Chalcomenite2
Petříčekite1
Olsacherite1
Quartz1
Native Selenium1
Data
Mineral Data:Click here to view Allophane data
Locality Data:Click here to view El Dragón mine, Porco Municipality, Antonio Quijarro Province, Potosí, Bolivia
Photo GalleryView Gallery (2 photos)
Data Identifiers
Mindat Occurrence Record ID:41492
Long-form Identifier:1:3:41492:0
GUID (UUID V4):0
References
Schnorrer-Köhler, Günther, Grundmann, Günter, Lehrberger, Gerhard (1990) The El Dragón Mine, Potosí, Bolivia. The Mineralogical Record, 21 (2) 133-146pp.133-133
Grundmann, Günter, Förster, Hans-Jürgen (2017) Origin of the El Dragón Selenium Mineralization, Quijarro Province, Potosí, Bolivia. Minerals, 7 (5) 68 doi:10.3390/min7050068
 
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