Metamorphic rocks of the plate boundary zones contain commonly large grains of albite and their clusters. The characteristic features of clusters are investigated by pairwise correlation and grain density maps with Gaussian mixed modeling (GMM). It shows that the compact cluster size is fitted well by Poisson’s distribution function. The simulation of mechanical coagulation of grains in the shear flow deformation clarified the periodically discrete GMM patterns of the grain density and pairwise correlation. The albite band formed by jog migration on the shear crack slip surface gives rise to make chlorite band, epidote band, and sometimes actinolite band in the sequential order outside the albite band, thereby suggesting symbolic dynamics of multi-mineral reactions with diffusive component ions in grain boundary solution. Crystal size distribution of albite and quartz in jog manifests decompression crystallization at jog formation during shear slip. In addition, the decompression brecciation of metamorphic rocks is possibly investigated from grain size distribution of breccia. Quartz grains in jog often have fluid inclusion array formed by healing and annealing of micro-open crack filled with aqueous fluid. Various time scales of annealing are inferred from size distribution of fluid inclusion to be in the range from 100 to 10,000 years after healing.