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Serendibite, a new borosilicate from Ceylon

Published online by Cambridge University Press:  14 March 2018

G. T. Prior  and
A. K. Coomáraswámy
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Extract

Mode of Occurrence.—This new mineral was discovered at Gangapitiya, near Ambakotte and about 12 miles east of Kandy, Ceylon. In this locality quarries have been dug for the well-known Ceylon moonstone, which occurs in large porphyritic crystals in an acid granulite.

Bands of this granulite, which is composed mainly of quartz and felspar in finely granulitic and occasionally graphic structure, alternate with bands of limestone up to 18 inches wide. Between limestone and granulite occur contact-zones consisting, next to the limestone, almost entirely of a coiourless diopside, but near the granulite of a mixture of diopside with other minerals, viz. blue spinel, a little apatite, occasionally scapolite or plagioclase, and the blue mineral which is the subject of the present note.

Type
Research Article
Information
Mineralogical magazine and journal of the Mineralogical Society , Volume 13 , Issue 61 , February 1903 , pp. 224 - 227
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1903

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References

Page 224 note 1 Further details as to the mode of occurrence of the mineral will be found in Quart. Journ. Geol. Soc., 1902, vol. lviii, p. 421.

Page 226 note 1 Calculated as if wholly Na2O: the presence of lithium, however, wan clearly indicated by the spectroscope.

Page 227 note 1 Tourmaline was also found very sparingly in the contact-zones, but the few crystals observed occurred only in soft material apparently filling cracks in the harder rock.