Starfire Glass 10-Pound Fire Glass Fire-Drops 1/2-Inch Cobalt Blue Reflective Starfire Glass The Ultmate in Fire Glass Quality! " Fire-Drops are uniform in size producing Mesmerizing Reflective Flames Superbly polished with a Warm, Radiant, Luminous Glow. Premium Tempering process with consistent Jewel-Like color throughout Replaces Existing Gas Logs & Lava Rocks. Very Safe and easy to install