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Dan R Lynch,
Bob Lynch
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Agate Hunting Made Easy
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Rocks, Gems and Minerals: A...
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Finding Gold in Colorado: The...
Laura a Hoeppner (Photographer),
Kevin A Singel
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Agates: Treasures of the Earth
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Mineral Treasures of the...
Bruce L Stinchcomb
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Dig and Discover Geodes
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The Firefly Guide to Minerals...
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Granites: Petrology,...
Anne Nédélec,
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The Smithsonian National Gem...
Dr. Jeffrey Edward Post
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Southeast Treasure Hunter's...
Kathy J. Rygle
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Rocks and Minerals of...
Vinson Brown,
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Gemstones: A Concise...
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Mineralogy of Arizona, Fourth...
Raymond W Grant,
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An Assessment of Mine...
Vladimir Pacheco Cueva
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Reactive Transport in Porous...
Peter C Lichtner (Editor),
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Finding Gold in Colorado:...
Laura a Hoeppner (Photographer),
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Colorado Gem Trails: And...
Richard M Pearl
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Gem Cutting: A Lapidary's...
John Sinkankas
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Essentials of Igneous and...
B. Ronald Frost,
Carol D. Frost
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An Introduction to...
Bruce Yardley,
Clare Warren
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Gem Trails of Arizona
Adrian Mitchell,
James R Mitchell
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Gem Trails of New Mexico
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Recovery and Refining of...
C W Ammen
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