Riverstone is proud to offer DuPont Zodiaq and Silestone quartz products. Quartz is an engineered stone, comprised of 93% quartz stone and 7% resin binder. The chunks of quartz are recombined using intense pressure and heat. As a result of this process, quartz typically does not have the veining or porosity that is found in natural stone. Pricing tends to be higher than granite, but quartz offers a stronger, non-bacterial surface. For those people who do not like the wild variation that can be found with some granite, quartz offers a more regular appearance. There are visible seams in quartz, just like granite.