Occurrence: Very Rare
Named after Australian C.W. Marsh who first described the mineral.
|Colour||Colourless or pale yellowish when fresh. Darkens to salmon-pink to brownish-red on exposure.|
|Fluorescence||Bright red under longwave UV|
Usually occurs as tetrahedral crystals that can alter colour upon prolonged exposure. Highly fluorescent. Many previously unknown marshite specimens have been “discovered” since the arrival of the Convoy-type UV torches.
Cuprite is the most common associate.
Anthony JW, Bideaux RA, Bladh KW, and Nichols MC (1995), Handbook of Mineralogy Volume III
Marsh CW, Liversidge A (1892) On native copper iodide (marshite) and other minerals from Broken Hills, N. S. Wales. Journal and Proceedings of the Royal Society of New South Wales 26, 326-332
Millsteed PW (1998) Marshite – miersite solid solution and iodargyrite from Broken Hill, New South Wales, Australia. Mineralogical Magazine 62, 471-475
Prior, GT (1902) The Identity of Kilbrickenite with Geocronite: And Analyses of Miersite, Marshite, and Copper-pyrites. Mineralogical Magazine 13
Spencer, LJ (1901) Marshite, Miersite and Iodyrite from Broken Hill, New South Wales. Mineralogical Magazine 13