Gray Reflective Tempered Fire Glass Introducing our Gray Reflective Tempered Glass – a harmonious blend of style and resilience that effortlessly elevates your surroundings. The cool gray color, with its reflective allure, adds a touch of modern sophistication to any space, creating a visually captivating ambiance. This material is similar to the colorful heat-treated glass seen in gas fire bowls and pits, but since it has not been heat treated it is lower in cost and more affordable for decorative purposes in gardens and landscapes.