The Geology And Gem Stones Of The Mogok Stone Tract Burma PDF Download

This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1898 edition. Excerpt: ...about thirty miles in a northeasterly direction from Bo Navong. An excellent description of the Ruby-mines has recently been published by Mr. H. Warington Smyth, who was for some years Director of the Department of Mines in Siam. He considers that the Rubies have probably been derived from the disintegration of certain basaltic rocks, which formed their matrix. The principal Rubyworkings are now at Bo Wen and Taphan Hin, in Chantaboon; and at Bo Yan, Navong and Klong Kwang, in Krat. Rubies are also worked at Ho Klong, Klong Yai and elsewhere, on the east side of the Kao Patat. Prof. H. Louis has also described the Ruby deposits of Moung Klung, between Chantaboon and Krat. He considers that the gem stones have been derived from the decomposition of the trap rocks, which occur so largely in the district. The Sapphires, which are of far more importance in Siam than the Rubies, will be fully described in a subsequent chapter. CEYLON RUBIES. From time immemorial the island of Ceylon, or "Taprobane" as it was termed by the classical writers of antiquity, has been famous for precious stones. These are found in the form of rolled crystals and rounded fragments in detrital deposits in the valleys, spread over the lowlands, and in the sands of rivers. Shallow pits are dug by the natives in these deposits, and the gem stones separated from the associated earth by simply washing. The principal localities for the stones are in the neighbourhood of Ratnapura, or the "City of Gems," and Rakwena. The gemstones include various kinds of coloured Corundum, but Sapphires are much more common than Rubies. Moreover, the Ceylon Rubies are usually of pale colour, being rosecoloured rather than decidedly red, are of only small value, and are, ...