Artisan Group, a North American group of 35 countertop fabricators, has launched its exclusive Aventine Quartz line with 23 colors. The Aventine Quartz color palette is contemporary with whites such as Luxe, Glacial and Titanium White; grays like Concrete, Graphite and Sage Honed; and veined marbles like Calacatta Aventine, Toffee and Vogue.