INTERIOR DESIGN Natural stone tilesPilkington is launching several new tiling products this month. Natural stone tiles have been added to the company's Quiligotti range. The tiles, a complete departure for Pilkington, come in sizes from 10cm x 10cm to 60cm x 40cm, including small and large mosaics available in slate, polished marble and granite, tumbled marble and travertine. Pilkington has …