Made from recycled glass and colored with natural mineral oxides then stamped individually and annealed through a linear kiln. Extremely strong and durable with excellent color fastness in extreme weather exposure (UV and frost resistant). The Ottoman sintered glass collection cuts easily and accurately using wheeled nippers with minimal crumbling or waste. This series has a matte non-slip finish with straight edges for minimal grout space. Each tile is 8mm square, 4mm thick.