"Fifty Minerals that Changed the Course of History" is a beautifully presented guide to the minerals that have had the greatest impact on human civilization. These are the materials used from the Stone Age to the First and Second Industrial Revolutions to the Nuclear Age and include metals, ores, alloys, salts, rocks, sodium, mercury, steel and uranium. 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.