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Russellite pegmatite, Poona, Cue Shire, Western Australia, Australia

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Location is approximate, estimate based on other nearby localities.
Latitude & Longitude (WGS84): 27° 7' 1'' South , 117° 30' 17'' East (est.)
Margin of Error:~0km
Locality type:Pegmatite
Köppen climate type:BWh : Hot deserts climate

A small acid pegmatite vein outcrops on a granite hill 8 kilometres east north-east of the main Poona emerald mining centre. Any official name for the location is unknown.

A sample was submitted for study to the CSIRO by A. Sipos of Mount Magnet in September 1962, and it was initially mis-identified as bismutite. It was re-examined in 1970, and the material was found to be russellite. At the time it was only the second known occurrence, although Mindat lists several worldwide sites for the species now.

The russellite is very fine grained, poorly crystallized, yellow to pale green, and within a mix of bismite, koechlinite, and bismutite.

The pegmatite is almost vertical, 61 metres long by 1 metre wide, with several offshoots. In 1970, prospectors had dug a pit 30 metres long by 1.5 metres deep, but it is unknown the present state of the site.

The pegmatite is composed of quartz and muscovite, but the reference does not describe if it is zoned. Minor wolframite, beryl, secondary brochantite, and yellow earthy patches of the russellite mix also occur. Bismutite also occurs separately.

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8 valid minerals.

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Hodge, L.C. (1970): Russellite - a second occurrence. Mineralogical Magazine 37, 705-707.

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