| A Key to Precious Stones Contributor(s): Spencer, L. J. (Author) |
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ISBN: 1443735558 ISBN-13: 9781443735551 Publisher: Hesperides Press OUR PRICE: $38.94 Product Type: Hardcover - Other Formats Published: November 2008 * Not available - Not in print at this time * |
| Additional Information |
| BISAC Categories: - Nature | Rocks & Minerals - Science | Earth Sciences - Mineralogy |
| Physical Information: 0.75" H x 5.5" W x 8.5" (1.08 lbs) 268 pages |
| Descriptions, Reviews, Etc. |
| Publisher Description: 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 Precious Stones, Their Action on Light Chemical Composition: What Precious Stones are Made of Geological Occurrence and Origin of Precious Stones Mining of Precious Stones Cutting and Polishing Gems: Forms of Cutting Imitation Gems and Artificial Gem-Stones . Nomenclature of Gems: Names of Gem-Stones and Minerals DESCRIPTIVE PORTION: Diamond - Corundum and it's Colour Varieties, Ruby and Sapphire - Spinel and Chrysoberyl - Beryl and Topaz The Garnet and Tourmaline Groups - Zircon and Olivine - The Quartz Group - Opal and Silica-Glass - Jade (Nephrite and Jadeite) - Lapis-Lazuli and Turquoise. Miscellaneous Gem-Stones - Gem Materials of Organic Origin: Amber, Jet, Pearls, Coral. |