MSI Fire Glass LFIRGSAPBLU0.5ROU10 0.5” 10 lb Round Sapphire Blue Fire Pit Glass Stones add dimension and sophistication to your indoor and outdoor spaces. These striking flat-backed, round-top stones conjure images of rich gemstones as the light glistens off them. The glass, which withstands intense heat and varying weather conditions, brings elegance to your fireplace, fire pit, landscape design, garden, water feature, or aquarium.