Fifty Minerals that Changed the Course of History western gem trails Best of all

Best of all

By delving into the world of decoding petroglyph artwork

Taxonomic nomenclature has been updated and new color plates and figures have been added

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Fifty Minerals that Changed the Course of History western gem trails Best of allFifty Minerals that Changed the Course of History is a beautifully presented guide to the minerals that have had the greatest impact on human civilization. The book also includes minerals used as currency, as jewelry and as lay and religious ornamentation when combined with gem minerals like diamonds, amber, coral, and jade. Entries are organized by name and considered for their influence in four categories: Industrial, Cultural, Commercial and