Abstract
SOME months ago, through the good offices of Mr. B. Topley, of Messrs. Albright and Wilson, Oldbury, we obtained several specimens of celestine from near Yate, Glos. Some were colourless, others tinged with blue, whilst a few were red. The blue crystals have been observed locally to occur lining channels or ‘pipes’ where water has bored through the massive mineral; the particular conditions favouring the red crystals are not apparently known.
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References
Dana, “Descriptive Mineralogyâ, 906 (1914). Miers, “Mineralogyâ, 589 (1929).
Doelter, “Die Farben der Mineralienâ (1915).
Using Pozzi-Escot's method of reduction (Ann. Chim. Anal., 12, 90 (1907)).
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FRIEND, J., ALLCHIN, J. Colour of Celestine. Nature 144, 633 (1939). https://doi.org/10.1038/144633a0
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DOI: https://doi.org/10.1038/144633a0
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