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The overall story of Wyoming's geology and history based on clues left in the state's rocks.
This popular nontechnical introduction to meteorites, asteroids, comets, and impact craters is now even better!
The ultimate illustrated guide for non-scientists.
The Connoisseur's Guide to Precious Gemstones.
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.
100 Unique Storied Agates. A delightful and alluring book.