10 LB Bag of 1/4" Midnight Black Reflective Fire Glass by Boone Hearth SAFE for use in any gas-fueled fireplace or fire pit. Tempered glass will not break, crack, or explode after prolonged exposure to high heat. Smooth edges allow for safe glove-free handling Dark reflective glass adds depth and dimension to your fireplace! Mix & match different shades for a custom color scheme!