
` Every person on earth uses, either directly or indirectly, ten metric tons of minerals each year.` So write Dr R. V. Dietrich & Dr Brian J. Skinner in their new book Gems, Granites, & Gravels. Minerals & mineral products are involved in all aspects of our lives; we depend on them to keep us alive & ensure the continuity of our society. As a consequence, they have been a source of fascination & study throughout human history. In this book, Drs Dietrich & Skinner consider not only the beauty of minerals & rocks, but also their utility & their roles in our everyday well-being. Gems, Granites & Gravels is a valuable introduction to mineralogy & to related specialities such as petrology (the study of rocks), crystallography (the study of crystals), & soil science. Discoveries in these fields are described in a historical context, while the authors explain what minerals & rocks are, how they are distributed around the world, how we depend on them, & where to see the most beautiful specimens of both minerals & rocks. This book will appeal to anyone interested in natural history & curious about rocks & minerals, including rock & mineral collectors, students of geology, & professional geologists.