American Fireglass Turquoise Recycled Fire Pit Glass - Medium (18-28Mm), 10 lb. Bag Color-infused, crushed, recycled glass, polished, sifted, packaged and quality controlled to perfection. 1/2"-1" thickness, unique color, chunkier sized pieces, and eco-friendly. For use with outdoor fire bowls, fire places and fire pits (liquid propane or natural gas), or as a decorative landscape. This glass can withstand higher temperature compared to logs, lava rocks, stones, etc. Does not emit any smoke, ash, or soot. Requires very little maintenance.