Del Conca 13NA20 Rectified Collection 4" x 24" Nature Porcelain Bullnose Tile Calacatta Gold, 0.34 Thickness, 10 pieces per case. Porcelain tile is made from natural material and is known for being a dense and durable solution. Porcelain is an ideal material for the people and planet as its eco-friendly attributes provide both aesthetic and environmental benefits to residential and commercial spaces. From unparalleled durability to zero-waste manufacturing, porcelain tile is the healthiest and most ecologically beneficial product on the market.