Fire Glass is made from tempered glass and manufactured to withstand harsh weather and extreme temperatures without sustaining any damage or discoloration. It also does not emit any harmful chemicals, smoke, soot, or ash. Fire Glass, also commonly known as fireplace glass or fire pit glass, can be used in fireplaces & fire pits both indoor & outdoor, in landscaping, aquariums, & even in art projects! The maintenance is also little-to-none with just a simple rinse of a 50:50 water/vinegar mix. Fire Glass is not just beautiful to look at, it’s also extremely practical. Use Fire Glass to cover the entire floor of the fire feature to hide any unseemly pies or tubes that are often visible in gas fireplaces & fire pits. We recommend to completely cover your burner and then add about 1-2 inches of fire glass on top of that.