Fire Pit Glass Crystals - Fire Pit Glass for Fireplaces and Fire Pits, Fire Pit Glass Crystals are a beautiful alternative to standard lava rocks in a fire pit. Fire pit glass crystals produce more heat than gas logs or lava rocks and will create a unique and stylish atmosphere that is sure to impress. Using Fire pit glass is simple, you simply remove any lava rock and replace with your choice of over 50 vibrant colors to choose from. Bahama Blue fire pit glass is looks just like pool water and is a best seller for fire pits. Add the look of crystal to your fire pi.