Precious Stones Guide Vol 7

Precious Stones Guide Vol 7
How Stones Are Distinguished From One Another An Explanation of Refraction An Explanation of Double-Refraction Table of Refraction in Gems Differences in Gem Refraction Absorption and Dichroism in Minerals and Gems Specific Gravity in Precious Stones Table of Specific Gravities of Gems Specific Gravity Determinations of Gems Lustre of Gems and Precious Stones Reflection Effects on Gems and Precious Stones Property of Hardness in Gems Identifying Gems Using the Hardness Test Table of Hardness of Gems Minerals Used in Testing Hardness Property of Dispersion in Gems and Precious Stones Testing Identity of a Gem with Dispersion Property of Color in Gems and Precious Stones Distinguishing Various Red Stones Distinguishing Various Yellow Stones Distinguishing Various Green Stones Distingishing Various Blue Stones Distinguishing Pink Stones Distinguishing Purple Stones Distinguishing Brown Stones Distinguishing Colorless Stones How to Tell Scientific Stones From Natural Gems Defects of Natural and Scientific Gems Testing Unknown Gems Durability of Gems: Hardness, Brittleness, and Cleavability (part 1) Durability of Gems: Hardness, Brittleness, and Cleavability (part 2) Durability of Gems: Hardness, Brittleness, and Cleavability (part 3) Gem Classification: Diamond and Corundum Mineral Species Gem Classification: Carbon and Quartz Mineral Species Gem Classification: Opal, Spinel, Chrysoberyl, Glass Silicates Gem Classification: Mineral Silicates The Naming of Precious Stones The Naming of Sapphires The Naming of Chrysoberyl Gems The Naming of Spinels The Naming of Topaz	Naming Beryl, Emerald, and Aquamarine Gems Naming Zircon and Tourmaline The Naming of Garnets The Naming of Quartz Gems The Naming of Opals Naming Jade, Peridot, and Olivine Gems The Naming of Feldspar Gems Naming Malachite, Azurite, and Lapis Lazuli Gems Diamonds Found in India Diamonds Found in Brazil, Australia, and America Diamonds Found in South Africa Rubies: Location and Market Sapphires, Chrysoberyl, and Spinel: Locations and Markets Topaz and Beryl: Locations and Markets Zircons and Garnets: Locations and Markets Tourmaline: Location and Market Kunzite and Quartz: Locations and Markets Where to Find Precious Gem Stones Cutting Rough Precious Stones Cleaving and Cutting Diamonds Polishing and Facetting Diamonds Slitting, Cleaving and Rubbing Down Precious Stones Polishing Gem Stones Good Make in Gem Stones General Types of Gem Cutting Imitation Precious Stones: Paste Gems Imitation Precious Stones: Doublets Imitation Precious Stones: Altered Stones Alteration of Color of Precious Stones The Structure of Pearls The Coloring of Pearls Peeling a Pearl The Shape and Weight of Pearls Pricing and Rarity of Pearls Physical Properties and Care of Pearls Cultured Pearls Imitation Pearls Use of Balances in Measuring Gems The Unit of Weight and Decimal System for Gems Tariff Laws on Precious and Imitaion Stones Bibliography
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