American Fire Glass AFF-COBLRF-10-J 1/4" Cobalt Reflective Fire Glass 10 lbs Jar. For thousands of years mankind has been drawn to the heat and beauty of fire. The hottest color of fire is blue, and its vivid intensity draws the eye, mesmerizing the viewer. Imagine being able to recreate this intense look in your customers' décor. Our 1/4" cobalt reflective fire glass makes it possible. Your customers are sure to relish the awestruck look on the faces of their families and friends as they gaze upon the orange and red flames in their fireplace, dancing upon and reflecting off these shiny blue cobalt fire glass pieces. The look of the 1/4" cobalt reflective fire glass is both striking and mod, and is guaranteed to make a bold impression in all gatherings, whether used indoors or outdoors.