American Fire Glass AFF-STFR-J 1/4" Starfire Fire Glass 10 lbs Jar. Our classic collection of 1/4" fire glass continues to mesmerize all visitors and enhance every ambiance. This delightful alternative to the usual gas logs will turn any fireplace or fire pit into a spectacular display. The flames from the natural gas or propane fire begin dancing on the beautiful tempered glass, bringing life to every gathering and dazzling the onlookers. The fire glass also does a wonderful job of obscuring the unsightly plumbing in gas fireplaces or fire pits.