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The ultimate illustrated guide for non-scientists.
This concise monograph provides a timely review of the minerals of the epidote group, including recent changes in the nomenclature and in-depth information on all presently known species.
This concise monograph provides a thorough, collector-oriented, review of the mica group, including recently described species.
An exciting journey through the history of life and the part our continent has played in it all.
Visit dramatic vistas of erosion that reveal fossil discoveries.
The definitive publication on the fascinating and beautiful Fairburn Agates of South Dakota.