CEMENTO COMPOSITE QUARTZCemento Composite Quartz is a dark grey engineered stone surface that mimics the look of concrete. It is a popular choice for countertops, vanities, and other surfaces in both residential and commercial applications. About 9095% of the crushed quartz in Cemento Composite Quartz is combined with resin binders, colours, and other ingredients. Benefits: They combine to create a strong, non porous material that is resistant to heat, stains, and scratches.