This decorative fire glass can be placed behind the glass of your fireplace. Available in different colors and two styles - ice rocks and glass pebbles, add color and enhance the look of your fireplace by adding more glass media. Your gas fireplace comes with standard media included in the box. However, we have additional decorative media available for you to customize the look of your fireplace even more. These decorative glass media are tempered and will not melt or degrade, although some discoloration is normal on glass that is placed directly on the flame.