The objective of this study is to analyze dry grinding behavior of four different pumices in terms of Bond grindability value, selection and breakage parameters values. For this purpose, firstly, Bond grindability test were made for four pumices. Then, eight different mono-size fractions for each of pumices were carried out between 1.7 and 0.106 mm formed by a √2 sieve series, and ground batch wise in a laboratory ball mill for determination of breakage parameters. Finally, S i and B i,j equations were determined from the size distributions at different grinding times, and the model parameters (S i, a T, α, γ, β and ψ j ) were compared for four different pumice samples. © 2011 Springer-Verlag.