Fireglass Fireplace Fire Pit Glass, 1/2" Cobalt Reflective Chunky, 15 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 15 Lbs of ~1/2" Cobalt Reflective Fireglass This glass has been tested and will not melt or discolor, if properly installed and used