Relevance. The need to organize the production of synthetic wollastonite – CaO·SiO₂, which is a valuable material for many industries, because the reserves of natural wollastonite in Russia are very limited, and it is always contaminated with exogenic inclusion. In this relation the needs of various industries can not be met. A promising direction for the organization of production of synthetic wollastonite is the use of opal siliceous-carbonate rocks with low iron oxide content. Aim. To obtain synthetic wollastonite based on opal siliceous-carbonate rocks, which in its composition and properties will be in demand in many industries, primarily in the production of light-colored construction ceramics and a high degree of sintering. Objects. Deposits and large occurrences of opal siliceous-carbonate rocks with iron oxide content less than 2% and a small content of clay minerals and quartz. Methods. Methods of quantitative chemical analysis of opal siliceous-carbonate rocks, X-ray phase studies, optical and electron microscopy, electron-probe studies providing a wide range of elemental analysis, methods of technological studies of synthetic wollastonite production. Results. The authors have identified and characterized the deposits of opal siliceous-carbonate rocks in the south of Russia suitable for synthetic wollastonite. They carried out the technological tests to produce wollastonite. Mineral and phase transformations occurring in roasting raw mixes when producing wollastonite were revealed. Using synthetic wollastonite, the authors developed the compositions of ceramic masses for producing clinker ceramics with water absorption less than 0.5%, ultimate compressive strength over 150 MPa and ultimate flexural strength over 50 MPa. This makes it possible to plan the production of a wide range of highly sintered construction ceramics – porcelain tiles, road clinker bricks, earthquake-proof bricks, transom bricks, steps, curbs, clinker thermal panels and other products.