Onlyfire 1/4-Inch Fire Glass for Natural or Propane Fire Pit, Fireplace, or Gas Log Sets, 10-Pound, Cobalt Blue Reflective 100% tempered fire glass Quality inspected to ensure impeccable performance and elegant appearance Fire glass are flat on the bottom surface and rounded to the top Premium Tempering process with consistent Jewel-Like color throughout Onlyfire fire glass also use for decoration like garden,back yard,fish tank,swimming pool,flower pot and so on.Will Not Discolor, Melt or Deteriorate. Will Not Emit Any Smoke or Odors