Majestic Crushed Glass Media for Gas Fireplaces is used to add color and enhance the display of your fireplace. Five colors to choose from. This fire glass media is designed to be used with gas fireplaces. If this is to be used with the Courtyard Outdoor Gas Fireplace, make sure that you have a matching Contemporary Hearth Kit. Note that the Contemporary hearth kit (for glass media) is not recommended for a Liquid Propane fueled model. Choose a color - Crystal, Scarlet, Cobalt, Ebony, or Amber.Create a work of art by adding colorful fire glass to your gas fireplace!