On Varieties of Zirkelite from Ceylon1
G. S. Blake and G. F. Herbert Smith
Assistant in the Mineral Department of the British Museum
1Communicated by permission of the Director of the Imperial Institute. A brief mention of this mineral has already been made, under the name zirkelite, in ‘Ceylon: Report on the results of the Mineral Survey in 1904–5,’ Colonial Reports, Miscellaneous, No. 37, London, 1906, pp. 29 and 40.