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.