Quartz countertops are fabricated from natural quartz, one of the hardest minerals found in the Earth, and small amounts of glass or metallic flecks are added to create variety, resulting in beautiful countertops. Other advantage of quartz is that it is a non-porous material, its texture does not allow bacteria to grow and resists against stains, protecting your family and making kitchen clean-up easy. For this reason, quartz countertops never need to be sealed. Quartz based engineered stones are produced using 93% pure natural quartz aggregates which are adhered with polymer resin with color powder, and have a hardness and flex strength which is much higher than natural stones and other engineered stones.