Fire Glass will instantly beautify your fire pit by adding a luxurious touch of reflection beneath the flame. This fire glass comes in three different color options, so you can customize the look of your unit to complement your existing patio decor. It has been tempered and washed, making the fire glass lustrous and safe to use, without ever discoloring or peeling. One 10lb container will cover two square feet. Note: the base layer of your unit should be built up of small lava rocks, to ensure the flame stays oxygenated for optimal heat.