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On a Specimen of Proustite containing Antimony

Published online by Cambridge University Press:  14 March 2018

H. A. Miers  and
G. T. Prior
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Extract

The specimen which is the subject of the present note is a magnificent piece of Proustite from Chañarcilio, Chili, which has been recently acquired for the British Museum. It is a mass of lustrous crystals, measuring about 3 inches by 2½ inches, and nearly 3 inches in height.

The specimen has a peculiar cockscomb appearance, due partly to the habit of the crystals and partly to the way in which they are grouped ; the lower part consists of Proustite, interpenetrated by a little minutely crystalline white Calcite, which on one side of the specimen extends partly over the crystals in the form of darker coloured acute rhombohedra.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 7 , Issue 35 , December 1887 , pp. 196 - 200
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1887

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