StonePly Inc: real stone, real light, real strong. StonePly stone panels are granite, marble or travertine bonded to a high strength aluminum honeycomb panel. The panels weigh just 3.4 lbs per square foot and are available in the world’s largest selection of natural stone varieties. CAD details, specifications and technical information are available at the website. StonePly is used for building cladding, curtain wall, elevators, and signage.