The analysis of theoretical and experimental studies in the field of diamond-abrasive cutting of materials is given, as well as the results of practical application of the technology of processing of natural stone with diamond disc saws. The most common types of equipment and construction of tools for sawing and edging of facing and decorative products of their natural stone are described. Issues of the theory of the working surface of the diamond-bearing layer, the work of single diamond grains and their compositions in the instrument are considered. The results of research on the choice of rational characteristics of the diamond-bearing layer of tools and technological modes of its work are highlighted. Practical recommendations on the effective use of diamond disc saws are presented and examples of calculating the technical and economic efficiency of their use in various technological operations.