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Abstract: The objective of this research work was to investigate the production of granulated foam glass–ceramic material from zeolitic rocks. The investigations have shown that grinding raw materials to particle size less than 0.5mm and adding 13.8% of alkali content provide production of material with the following properties: particle density – 340kg/m3, strength – 1.6MPa and water adsorption – 13% at firing temperature of 850°C. Expanded zeolite with alkali content is a material of glass–ceramic composition with amorphous part of 38.6% and crystalline part of 61.4% that gives higher strength in comparison with sponge glass. [Copyright &y& Elsevier]