Della Terra Quartz Reviews . The salespeople told us that this quartz was chip proof and that the warranty would cover any stains and chips and dents. Quartz brings an elegant and contemporary look to any space. Vittoria White Della Terra Quartz collection Kitchen Countertop from www.houzz.com Caesarstone has 93% quartz content, ensuring your counter is strong, durable, and will last a long time. We bought the della terra quartz here in summer 2017 and within months water began to stain it. It combines beauty and functionality in a high performance surface.