I’ve heard of “high movement” stone. What is it?

Sometimes called “grain in the stone”, “movement” is veins that swirl and change irregularly in granite due to the massive forces at work on it beneath the surface of the earth during the eons it took to form.  “Movement” is also affected by trace amounts of other minerals such as hornblende, magnetite, hematite, pyrite, zircon, garnet and corundum.  Many people find this flow of blending colors to be the most attractive and compelling quality about granite.