The joints compose multiple patterns, and hence from numerous dark lines and spots on the polished surfaces of the rock, which reduce the average polishing glossiness and uniformity.

• 多种形式的节理网在花岗石抛光面上形成低反射率的暗线、暗斑、晴区，降低花岗石的平均光泽度，影响光泽度的均一性和石加工品的质量。