RGLASS-CN AZ Patio Heaters Recycled Fire Pit Fire Glass in Chestnut 1/3-Inch Recycled Fire glass is a beautiful addition to your fireplace or fire pit. Fireplace Glass and Fire Pit Glass are growing in popularity as ceramic logs and lava rock are becoming a thing of the past. Adding one of our 12 colors of Fire glass to your dcor will give your entertaining areas new life and a modern look. Flames dance and flicker on luminous jewel-like glass turning your fireplace or fire pit into a unique piece of art. Fireplace Glass and Fire Pit Glass are formulated for long-term heat consumption. It will not melt or degrade and will last virtually a lifetime.