This well-illustrated popular guide to agates opens with a section on the various mineralogical, geological, trade and trivial names, before going on to give a scientific description of their nature and properties. The main section of the book begins with a useful account of six different types of geological environment in which agates occur, and lists the numerous localities throughout the world where they are found, with sketch maps indicating the agate-producing areas. In the remaining chapters, notes are given on the various techniques used by the lapidary industry in presenting agates, including sawing, grinding, sanding and polishing, with some...

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