FireCrystals® are beautiful tempered and recycled glass pieces used to permanently replace the burning of wood or use of fake logs in open vented, natural gas and propane gas fireplaces and fire pits. FireCrystals® last forever and they are heated by the natural gas or propane gas. They do not melt, degrade in quality or color, or emit any carbon toxins. The heat that our product produces is plenty to keep you warm and cozy. FireCrystals® renovates the style of indoor and outdoor fireplaces and outdoor fire pits. FireCrystals® colors brilliantly add luster and elegance to your fireplace and surrounding atmosphere.