Galena with mosaic development of the crystals

An excellent large cabinet size specimen with mosaic development of the crystals. This kind of aggregates are usually due to overgrought of large single crystal. One, some or all of the faces, start to grow with mosaic step mode and due ( most likely) to fast crystallization and unequal concentration of solutions, develop single crystal with individual temp of growing, but with joined direction of development and isolated crystals with inherited orientation.