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Gunheath China Clay Pit, Stenalees, Treverbyn, St Austell District, Cornwall, England, UK
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UK Grid Reference: SX004571
Latitude: 50°22'45"N
Longitude: 4°48'27"W
 
 
Plancheite supposedly collected here in 1958 by Arthur Kingsbury (1906-68) is now considered "very doubtful" and probably from Arizona. This is one of a number of likely or definitely falsified Kingsbury localities.

Given the iron-rich nature of the mineral assemblage and its manganese-poor character, the strunzite should be validated from the more likely ferrostrunzite possibility.

Mineral List

Albite
'Apatite'
Arsenopyrite
Arthurite
Azurite
Barbosalite
Beraunite
Beryl
'Biotite'
Bismuthinite
Brochantite
Cacoxenite
Cassiterite
Chalcopyrite
Chalcosiderite
'Columbite'
Columbite-(Mn)
Connellite
Copper
Corundum
Covellite
Cuprite
Cuprite
var: Chalcotrichite

Cuprotungstite
Cyrilovite
Digenite
Dravite
Dufrénite
Elbaite
Ferberite
Florencite-(La)
Fluorapatite
Fluorite
Frondelite
Goyazite
Hentschelite
Kaolinite
Kuramite
Lepidolite
Leucophosphite
Libethenite
Malachite
Mawsonite
Metatorbernite
'Mica Group'
Microcline
Mitridatite
Morinite
Muscovite
var: Gilbertite
var: Sericite
Opal
var: Hydrophane
Orthoclase
Pharmacosiderite
Plancheite ?
Pseudomalachite
Pyromorphite
Qitianlingite
Quartz
var: Jasper
var: Smoky Quartz
Rockbridgeite
Rutile
var: Ilmenorutile

Scheelite
Schorl
Scorodite
Stannite
Stannoidite
Strunzite
'Tantalite'
Tennantite
Topaz
Torbernite
'Tourmaline'
'var: Achroite'
Turquoise
var: Rashleighite
Variscite
'Varlamoffite'
Wavellite
Waylandite
'Wolframite'
Wurtzite
'Zinnwaldite'
Zircon


86 entries listed. 68 valid minerals.

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References

- Williamson, B.J., Stanley, C.J., and Wilkinson, J.J. (1997): Implications from inclusions in topaz for greisenisation and mineralisation in the Hensbarrow topaz granite, Cornwall, England. Contributions to Mineralogy and Petrology 127, 119-128.
- Elton, N. J. (1998): Barbosalite, frondelite and other phosphates from Gunheath China Clay Pit, St Austell, Cornwall, England. Journal of the Russell Society 7, 15-18.
- Ryback, G., Hart, A.D., and Stanley, C.J. (2001): Journal of the Russell Society 7(2).

External Links


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Copyright © Jolyon Ralph and Ida Chau 1993-2014. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them. Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of thousands of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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