Publisher: Wikibooks 2014
This book has a single purpose: to explain how it is even possible to reconstruct the history of the Earth from data available in the present. The emphasis of this book is therefore methodological: rather than explaining what is known, we shall look at how it is known.
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by Oliver C. Farrington - A. W. Mumford
Where do they come from? What are they made of? How can they be distinguished? What is their value? The subject as a whole has been treated from the mineralogical standpoint, as this affords the best basis for a thorough knowledge of gems.
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This book will be of value to the experienced prospector who would like to learn something of geology; the young geologist who needs information on practical prospecting; the novice who needs a comprehensive reference; and the experienced geologist.
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This paper introduces and describe five species of minerals which are represented in a small collection brought out of the copper mines of Butte, Montana. The species included are native copper, azurite, malachite, rhodocrosite, and chrysocolla.