FIELD: construction, and architectural and finishing work. SUBSTANCE: blend for preparing black stone or glass ceramic materials comprises (wt %): dolomite 10.0-40.0; calcium carbonate (chalk, limestone, marble), 28.0-60.0; and natural phosphate benefication waste, 25.0-60.0. Blend further comprises alkali metal salt in amount of 0.01-6.0 wt %. EFFECT: materials of intensive black color with high mechanical and physical- chemical properties. 3 cl, 1 tbl
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