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Entirely new method of graphic representation of data stored in database is elaborated within frame of processing of system for rapid evaluation of coal deposits. Petrographic and geological symbols have been generated mostly by creation of singular pattern for each rock type including its impurities and other features. However, such a conventional symbols do not allow represent number of combinations of features typical for rocks in real occurrences. Any further information (for instance calcareous impurity, coal fragments etc.) multiplies the existing number of patterns. The consequence is that there are many patterns for only most frequently occurring coal, rock and transitory rock types. The main principle of new symbol creation is based on mutual combining of symbols. Thereby all essential characteristics of coals and rocks can be represented graphically in whatever combination while preserving lucidity and non-ambiguity conditions. Representation of particular proportions of three-grain sized components in rock indicating by adverbial expressions of highly, slightly and medium (for instance slightly sandy highly silt clay) is enabled. Particular types of coal occurring in transition rocks are represented by appropriate graphical symbols according to genetic type. Problems with old terms of coals and rocks according to other types of classification were taken into consideration. At elaboration of the system, hitherto valid regulations, usage and standards were consulted. The resultant system is simple and easy to control in face of options it enables.