White Mountain Hearth By Empire Crushed Fire Glass - Clear Frost. DG1CLF. Fire Glass. Add some sparkle to your fireplace with this Clear Frost crushed glass from Empire Comfort Systems. The transparent Clear Frost glass has non-reflective white surfaces that warmly glow in the light from the flames. This decorative glass conceals the burner and creates the illusion of flame floating above a reflective field. All of the glass starts as tempered panes that are shattered screened for the proper particle size and tumbled to minimize sharp edges. Mix and match with other colors and styles to create your own unique look for your fireplace. Designed for use with the Loft vent-free gas media burner....