Fireglass Fireplace Fire Pit Glass, Cobalt Reflective Chunky 1/2", 25 LBS "Reflective" fireglass is tempered glass with one side metallic/mirror-coated Highest quality tempered fire-glass on the market Product made by Fireplace Glass San Diego Package includes 25 Lbs of ~1/2" Cobalt Reflective Fireglass This glass has been tested and will not melt or discolor, if properly installed and used