MINERALOGY. 335 



PRECIOUS STONES. 



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DE BOURNON, The Count. A Descriptive Catalogue of Diamonds 

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4to. 52 pp., V. plates. London, 1815. 

 EMANUEL, II. Diamonds and Precious Stones. 



8vo. 266 pp. London, 1867. 

 GURLT, A. Ubersicht der pyrogenneten Kiinstlichen Mineralien. 



8vo. 100 pp. Freiberg, 1857. 



JEFFRIES, D. A Treatise on Diamonds and Pearls. Fourth edition. 



8vo. 116 pp. London. 

 KING, C. W. The Handbook of Engraved Gems. 



8vo. 396 pp. London, 1866. 



The Natural History of Precious Stones and Gems, and of 



the Precious Metals. 8vo. 442pp. London, 1865. 



The Natural History of the Precious Stones, and of the 



Precious Metals. 12mo. 364pp. London, 1870. 



KLUGE, K. E. Handbuch der Edelsteinkunde fur Mineralogen, 

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 MAWE, John. A Treatise on Diamonds and Precious Stones. 



8vo. 166 pp., III. plates. London, 1815. 



Travels in the Interior of Brazil ; with a Particular Account 



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8vo. 493 pp. London, 1821. 

 SCHRAUF, Albrecht. Handbuch der Edelsteinkunde. 



8vo. 252 pp. Vienna, 1869. 

 TRAILL, G. W. An Elementary Treatise on Quartz and Opal. 



12mo. 73 pp. Edinburgh, 1870. 



