Rocks, gems and minerals / Породы, драгоценные и "обычные" минералы

The term geology is a combination of two Greek expressions: “Geo” refers to the Earth, and “logos” refers to the logic and language used to explain your observations. So think of geology as a way to organize and explain the Earth processes that we see all around us. For some of the strange shapes we see, an educated explanation would be great. Most of what we know is good guesswork, based on lab experiments and inferences that take many detailed drawings to explain and a lifetime to understand. Fortunately, the more you see, the better things fall into place. <...>