Get more from your quartz flooring system by selecting the optimal grade profile that will best suit the ergonomic requirements of your environment. Quartz ColorGranules are available in two standardized grade profiles, including: 40-S Grade (40 mesh, spherical) and 25-A Grade (25 mesh, angular). 40-S grade is used for lighter duty broadcast systems at 1/8″ thickness. 25-A Grade is used for heavier duty trowel systems at 3/16″ thickness or greater.