Allen And Roth Quartz Price . Allen roth colfax 3 light pendant 81 reference of kitchen island lighting valleymede replacement glass globe and cardington aged bronze mason jar. The allen roth quartz countertops made of engineered quartz (not to be confused with quartzite, another appealing natural stone used as counters) is a manmade product created mostly from natural materials. allen + roth Brilliance Quartz Kitchen Countertop Sample in the Kitchen from www.lowes.com $50 to $60 per square foot. Here's the average cost of quartz countertops by grade and quality: They source different products from multiple manufacturers, some exclusive colors, some are just relabeled.