A Key to Precious Stones

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.

Produktdetails

• Autoren: L. Spencer, L. J. Spencer
• Verlag: External catalogues UK
• Sprache: Englisch
• Produktform: Fester Einband
• Erschienen: 24.11.2009
• EAN: 9781443735551
• ISBN: 978-1-4437-3555-1
• Themen: Naturwissenschaften, Medizin, Informatik, Technik > Geowissenschaften > Mineralogie, Petrografie; Sachbuch > Natur, Technik > Natur: Allgemeines, Nachschlagewerke