Eliane Ceramic Tiles USA has introduced its Petra Series, a new collection featuring variations of natural stone in mingled hues chosen to evoke the quiet, peaceful presence of nature. Offered in a 16-inch-square format floor tile, the Petra series is available in an assortment of shades and three different reliefs, to allow diverse combinations that reflect the randomness of nature, the company says. For details, circle 144 on the Free Information card.