The article continues the development of methods for describing the structures of rocks and ores based on the statistics of intergrain contacts. A brief overview of the previous results is given and a new task is formulated – taking into account the dimensional effect of mineral grains in structures far from the Hardy – Weinberg equilibrium. The calculation shows that in structures close to the specified equilibrium, the disclosure of mineral grains does not depend on the number of neighbors. The results are relevant to the problems of general quantitative characterization of rock structures and prediction of ore technological properties based on the features of coalescence of ore minerals with non-metallic ones.