| #8840147 in Books | Spencer L J | 2008-11-04 | Original language:English | PDF # 1 | 8.50 x.75 x5.51l,1.08 | File Name: 1443735558 | 268 pages | A Key to Precious Stones
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Originally published in 1937, this book deals primarily with precious stones as mineral products and is written from a mineralogical point of view. It gives a background to the principles of mineralogy and uses technical terms, but aims to put these into popular language, making this an easy to use guide. Contents Include: GENERAL PRINCIPLES: Introduction Colour, Lustre and Brilliancy Density and Hardness, Heaviness and Durability Forms of Crystals Optical characters of...
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