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Rocks and minerals / Горные породы и минералы
Издание 2
ROCKS AND MINERALS are a fundamental part of the Earth’s crust. Collecting and studying them can be both a rewarding and an absorbing hobby. This can involve traveling to exciting places, a lot of research, and some time spent cataloging and displaying finds. As your collection grows, you can exchange material with other collectors and purchase rare or exceptional specimens from mineral dealers <...>