... -size Quartz kitchen countertop Black Quartz countertop CommodityCharacteristicSizeThicknessColorsCompositeQuart SurfaceThough and no out-break,Durable and no deformation,Scratch resistance,Heat resistance,Non-toxic ... colors are available90%--93% natural quartzBillow Quartz StoneThough and no out-break,Durable and no deformation,Scratch resistance,Heat resistance,Non-toxic, non ...