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Mineralpedia Details for Marshite

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Marshite

Marshite

Named after Charles W. Marsh who was the first to note the mineral at Broken Hill in Australia from which Marshite gets its type locality. Marshite is a rare mineral that occurs only in Australia, Chile, and Finland and some newer localities in Russia and Germany. At Broken Hill it occurs in the oxidized zone of the metamorphosed lead-zinc-silver deposit, in Chile in an oxidized copper prophry deposit, and in Finland on a copper anomaly and introduced by brackish seawater. Under short-wave ultraviolet light Marshite will fluoresce a deep red.

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

Formula
CuI 
Crystal System
Isometric 
Cleavage
Perfect, None, None 
Luster
Adamantine - Greasy 
Color
brown, colorless, light yellow, dark brownish red 
Streak
yellow 
Class
Isometric - Hextetrahedral 
Fracture
Brittle - Conchoidal 
Hardness
2.5 
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Marshite from Oradea, Bihor Co., Romania

Marshite
            from Oradea, Bihor Co.,  Romania

Marshite crystals showing octahedral form to 5mm.

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Marshite from Broken Hill, New South Wales, Australia

Marshite
            from Broken Hill, New South Wales, Australia
Special Info
Type Locality

Light honey-colored Marshite microcrystals to <1mm scattered on matrix composed mostly of Cerussite with minor green Malachite.

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Marshite from Rubtsovskiy mine, Altaiskiy Krai, W. Siberia, Russia

Marshite
            from Rubtsovskiy mine, Altaiskiy Krai, W. Siberia, Russia

Excellent octahedral crystals to 4mm. Marshite is a rare copper halide.

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