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Gemstone Buying Guide:


How to evaluate, identify, select and care for colored gems

A great book to learn about the market for colored gemstones. Includes lots of basic information about colored gemstones: price factors, cutting styles, color, clarity, weight, synthetics, immitations and gemstone care. Our favorite parts are the many great photos and the detailed descriptions for a large number of gemstones. This book is a 7" x 9" paperback with 155 pages. Second edition.

Gemstone Buying GuideTable of Contents

Acknowledgements7
1. Colored Gem Price Factors in a Nutshell8
Price Factors Explained8
Two Common Beliefs Which Warrant Review15
Colored Gem Pricing16
2. Shape and Cutting Style18
Gemstone Terms Defined19
Traditional Cutting Styles20
Fancy Cuts and Cutting Techniques24
Carving27
Drusy Gem Materials31
3. Carat Weight33
Size Versus Carat Weight33
Effect of Carat Weight on Price34
Estimating Carat Weight35
4. Gemstone Color36
Evaluating Gemstone Color37
How to Examine Color39
How Lighting Affects Gem Color40
5. Judging Clarity and Transparency42
Gemstone Inclusions43
Gemstone Blemishes45
Examining Gemstones for Clarity45
How Lighting Can Affect Your Perception of Clarity47
Do We Need Grades to Evaluate Clarity and Transparency?48
6. Judging Cut Quality49
Judging the Face-Up View49
Judging the Profile51
How Cut Affects Price54
Judging "Life"55
7. Evaluating Star and Cat's-Eye Stones56
8. Treatments59
9. Synthetic Stones63
Synthetic Versus Natural64
10. Deceptive Practices65
Misnomers67
11. Gemstone Descriptions68
Amethyst and Other Quartz Stones71
Chalcedony75
Chrysoberyl (Alexandrite, Cat's-eye… )80
Emerald and Other Beryl Stones82
Garnet86
Iolite91
Jade92
Lapis Lazuli100
Malachite101
Moonstone and Some Other Feldspars102
Opal104
Peridot112
Spodumene113
Ruby and Sapphire (Corundum)114
Spinel118
Tanzanite and Other Zoisites120
Topaz122
Tourmaline124
Turquoise128
Zircon130
Ammolite132
Andalusite, Apatite133
Azurite, Benitoite134
Charoite, Calcite135
Diopside, Fluorite136
Hematite, Natural Glass (Obsidian, Moldavite)137
Larimar, Prehnite, Rhodonite138
Rhodochrosite, Sugilite139
Sphene (Titanite), Variscite140
Test Your Gem IQ141
12. Caring for Your Gems142
Birthstones and Anniversary Stones146
Suppliers of Jewelry and Stones for Photographs147
Bibliography150
Index153