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Agates Inside Out


Agates Inside Out is a wonderful book that introduces you to the world of agates. What are they? How do they form? What mysteries do their colorful patterns reveal? Where to look for them? What types of agates can be found there? Lots of great photos, charts and diagrams. Written so that almost anyone with an interest can learn.

Agates Inside OutTable of Contents

Dedicationvi
Acknowledgementsvii
Introductionviii
Chapter 1: What is an Agate?1
A Basic Description1
Agates and Human History2
Agates and Their "First Cousins"4
Macrocrystalline Quartz4
Fibrous Microcrystalline Quartz8
Granular Microcrystalline Quartz9
Silicified Fossils10
Quartz Properties14
Chapter 2: How Did Agates Form?16
The Earth - In the Beginning16
Agate Formation21
Inflow Agate Genesis Theory24
Possible Sources of Silica28
Silica Transport31
Infiltration Channels34
Concentric Banding41
Horizontal Banding55
Silica Gel Agate Genesis Theory57
Agate Genesis Conclusions60
Silica Gel Theory60
Inflow Theory62
Types of Host Rock65
Igneous Rock Agates67
Amygdaloidal Agates67
Rhyolitic Agates70
Sedimentary Rock Agates73
Timing of Agate Formation76
Chapter 3: How Do You Find Agates?82
A Pocket Filled In88
Banding and Other Patterns90
Translucency93
Color95
Shape, Size, and Weight106
Luster109
Husk112
Connective Channels118
Pseudobands120
Agate-Want-to-Be122
Chert, Flint, and Jasper122
Metamorphic Rocks126
Secondary Fills127
Silicified Fossils128
Other Agates-Want-to-Be132
Caring For and Cleaning Agates135
Assessing the Value of Agates138
Chapter 4: What Are the Different Types of Agate?139
Botryoidal (Grape) Agates139
Brecciated (Mosaic) Agates140
Candy Striped Agates141
Carnelian Agates142
Cloud Agates144
Crazy Lace Agates144
Dendritic Agates146
Enhydro (Water-Filled) Agates150
Eye Agates151
Fire Agates156
Flame Agates158
Floater Band Agates159
Fortification Agates159
Geode Agates161
Iris (Rainbow) Agates162
Jasper Agates165
Moss Agates165
Paintstone Agates168
Peeler Agates168
Plume Agates170
Polyhedroid Agates172
Pseudomorph Agates173
Ruin Agates174
Sagenite Agates175
Sardonyx177
Seam Agates178
Shadow Agates180
Stalk Aggregate Agates182
Thunder Egg Agates182
Tube Agates184
Water-Level Agates186
Chapter 5: Where Can You Find Agates?187
A Selection of United States Agates187
California190
Florida191
Idaho192
Iowa193
Kentucky194
Michigan196
Minnesota198
Missouri200
Montana201
New Mexico203
Oregon204
South Dakota207
Texas210
Wyoming211
A Selection of International Agates212
Argentina212
Australia215
Botswana, Africa216
Brazil218
Canada220
Caribbean223
China225
Mexico227
References231
Index239
Museum Information243
How to Vote for Your Favorite Photograph244
Information About Agate DVDs and Other Products244
Rock Hunting Log245