Gem Testing

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Read Books Ltd, Oct 25, 2011 - Nature - 350 pages
This vintage book contains a complete guide to testing gems and gemstones for purity and authenticity. Complete with a plethora of useful illustrations and all the information a prospective or existing enthusiast might need to know about the subject, this book constitutes an ideal resource for anyone with an interest in lapidary and gem testing. The chapters of this volume include: “How to Use this Book”, “Refractive Index and its Measurements”, “Double Refraction and How to Detect It”, “Colour, Colour Filters and Dichroscope”, “The Specific Gravity of Gem-Stones and How to Measure It”, “Detection of Synthetic and Imitation Stones”, “The Use of the Microscope”, etcetera. This antiquarian book is being republished now in an affordable, modern edition - complete with a specially commissioned new introduction on gemmology.
 

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Contents

HOW TO USE THIS BOOK
REFRACTIVE INDEX AND ITS MEASUREMENT
DOUBLE REFRACTION AND HOW TO DETECT
COLOUR COLOUR FILTERS AND THE DICHROSCOPE
SPECIFIC GRAVITY AND HOW TO MEASURE IT VI DETECTION OF SYNTHETIC AND IMITATION STONES
THE USE OF THE MICROSCOPE
THE USE OF THE SPECTROSCOPE
THE IDENTIFICATION OF DIAMOND
THE IDENTIFICATION OF EMERALD
AQUAMARINE AND ALEXANDRITE
THE IDENTIFICATION OF ZIRCON
THE IDENTIFICATION OF TOPAZ
THE IDENTIFICATION OF PINK MAUVE ETC STONES XVII THE IDENTIFICATION OF BROWN AND ORANGE STONES
QUARTZ OPAL AND GARNETS
TOURMALINE PERIDOT AND SPINEL
IDENTIFICATION OF TRANSLUCENT AND OPAQUE STONES

THE IDENTIFICATION OF RUBY
THE IDENTIFICATION OF SAPPHIRE
REAL CULTURED AND IMITATION
NAMES AND ADDRESSES OF RECOMMENDED SUPPLIERS

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