Blue Tempered Fire Glass creates a unique effect and a great conversation piece! Replace ceramic logs and lava rocks with mirror-reflective Fire Glass. Each glass measures an average size of 1/2". The fire glass offers a unique touch of attraction to a fireplace or fire pit. It shines in the daytime and appears multicolored at night with fire. The fire glass is made from tempered glass, with fire & heat resistance up to 1110°F / 600°C. It does not melt, break or emit smoke while burning at high temperatures. In addition to being used in a fire pit and fireplace, this glass can also be used in aquariums or for landscaping purposes.