XMC2008-ASHLEY WHITE QUARTZ ideal for both residential and commercial installations and is recommended to craft beautiful brown quartz countertops, backsplashes, shower surrounds, accent walls, table and bar tops, and even floors.? XMC4043-Motain Grey Quartz Slabs is available in slabs and tiles. Sizes can be adapted to each project requirements. Standard thickness is 1" and maximum size for this thickness is 12x12". For other thicknesses, check available sizes.