... I advise you to read this book in a row, since sometimes, to understand the essay, you need some knowledge from the previous chapters. The book falls into two parts: the first introduces stone into the world in nature, introduces its properties and education in the complex course of the phenomena of nature and life; the second - takes the reader to two sharply different areas - to the area of ​ ​ the wonders of stone, striking the imagination and causing a thousand fantasies, and to the area of ​ ​ everyday human life - to the fate of stone in industry and farming...