The manufacturer works with clean-up organizations to salvage high-quality aluminum alloy from old airplanes to make Bio-Luminum tiles. Fabricated from 100 percent recycled (and 100 percent recyclable) aluminum, the material is melted into a block and sliced into 6- and 12-inch tiles measuring 1/8 of inch thick. Cost: $60 per square foot. Coverings Etc. 800-720-7814.