Caesarstone’s Piatra Grey, which is part of the Classico Collection, provides natural beauty and functionality for any application. Never requiring sealing while large slab sizes provides a sleek and modern aesthetic, the Classico collection has minimal maintenance. The quartz surfaces offer numerous advantages over other types of surface materials such as marble and granite. As one of nature’s strongest and most abundant minerals, quartz has a hardness of seven on the Mohs scale (this measures the hardness of a mineral); a diamond is the hardest at ten. Classico™ surfaces offer four times the flexural strength and double the impact resistance of granite.