New Ravenna Mosaics, known for its hand-cut glass and stone tiles, launched a new pattern in February. The Houndstooth Collection gives the historic duo-tone motif a contemporary feel while paying homage to the designer and founder Sara Baldwin’s Scottish heritage. The collection’s four variations, which start at $155 per square foot, include a classic black-and-white colorway made from jasper and alabaster. Additional options are crafted from gold- and ruby-colored glass, purple amethyst and rose quartz, and …