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Mineralpedia Details for Ashburtonite

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Ashburtonite

Ashburtonite

Named for the type locality at the Ashburton Downs in a copper deposit in Western Australia, Australia. The only additional locality for Ashburtonite is at the Tonopah-Belmont mine in Arizona, USA. It occurs at the type locality at a weathered shear zone that cuts through shale and greywacke, and forms as an alteration product of galena and likely chalcopyrite. Associated minerals include diaboleite, duftite, beudantite, caledonite, plattnerite, cerussite, malachite, and brochantite.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/ashburtonite.pdf

Formula
HCu4Pb4Si4O12(HCO3)4(OH)4Cl 
Crystal System
Tetragonal 
Crystal Habit
Prismatic 
Cleavage
None, None, None 
Luster
Vitreous (Glassy) 
Color
blue 
Streak
light blue 
Class
Tetragonal - Dipyramidal 
Fracture
Brittle - Conchoidal 
Hardness
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Ashburtonite from Ashburton Downs, Western Australia, Australia

Ashburtonite
            from Ashburton Downs, Western Australia, Australia

Sky blue earthy crust.

Click thumbnail images for larger view.

Ashburtonite from Anticline prospect, Ashburton Downs, Western Australia, Australia

Ashburtonite
            from Anticline prospect, Ashburton Downs, Western Australia, Australia

Deep blue compacted crysatls in a mass.

Click thumbnail images for larger view.

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