Shandong white hemp stone features evenly distributed patterns with a delicate texture. The surface is free of fine veins and micro-cracks, with no missing edges or corners and a consistent color, which qualifies it as premium grade. The quality of the stone can also be tested by the sound it makes when struck, which should be clear and pleasant, and by adding ink to the surface, where it should coalesce without spreading. These indicate a high density and good quality of the slabs.