Expert Guides: Minerals & Gemstones
Description:
Features 300 minerals and gemstones, from copper, gold, and silver to opal, kernite, and gismondite Learn what the Earth is made of, how its rocks were formed and how minerals and gems are used today. Information tables give color, luster, streak, hardness, specific gravity, cleavage, habit, and crystal system Each entry is illustrated with a full-color photo
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