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Bayldonite - Wheal Carpenter, Fraddam, Gwinear-Gwithian, St Erth - Gwithian Area, Cornwall, England, UK
(#:MINS7859)
Cluster bright green sub-mm crystal of Bayldonite from a classic UK locality !
Formula :
PbCu
3
[O/(OH)
2
/(As
5+
O
3
(OH))
2
]
System:
monoclinic
Hardness:
4½
Rarity:
not common
Strunz id:VII/B.33-10 - PHOSPHATES, ARSENATES and VANADATES
Name origin:
Named in 1865 by Arthur Herbert Church in honor of English physician John Bayldon [1837(8) - April 6, 1872 Melbourne, Australia]. Bayldon received degrees from University of Edinburgh and University of London. In the late 1850 s, Bayldon was lecturer of botany at the Royal College of Surgeons at Edinburgh. While in Edinburgh, he also published observations of geological and botanical subjects. He emigrated to Australia in 1866 for health reasons. He became surgeon and medical officer of the Melbourne Benevolent Asylum, and, for a short time before his death from Bright s Disease, was the Superintendent of the Ararat Lunatic Asylum. It is widely stated that John Bayldon found the original specimens. He did not. Church (1865) specifically states that the specimen came from a mineral dealer Mr. [Richard] Talling, who had supplied Church with a number of new species.
Specimen weight:56 gr.
Crystal size:sub-mm
Overall size: 52mm x 35 mm x 28 mm
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