Fischer K. 2006. Gemstone processing. Volume 2, 4th edition, Rühle-Diebener Verlag (Stuttgart), p. 318. "The German market lacks specialist books that enable gemstone cutters and processors to work thoroughly and in a modern manner. This book fills that gap." Ball grinding: Selection of raw material, production of the ball blank, grinding, sanding, polishing Facet grinding: Types of cuts, proportions, angles and divisions, diagrams, orientation, grinding, polishing Stones from A-Z: Tabularly arranged - important properties in terms of grinding technology bound; Format: 25 x 19 cm;