The opportunities provided by the application of geostatistical methods to the assessment of mineral deposits of complicated geological structure have been presented basing upon the data from the Połom deposit of the Wojcieszów Limestones. It was found that the random component is clearly identifable in the variability structure of Iimestones quaIity parameters, despite their significant IithoIogical inhomogeneity. The variability of limestones quality parameters is weIl described by the sphaericaI model of variograms. For the studied deposit the values of model parameters aIlow to determine the 10 x 10 meters homogenic blocks. Thus, the kriging methods can be applied to both the reserves estimation and the deposit quality evaluation.