With the Teamson Home clear fire glass rocks, you can add a touch of glamour to your gas fire pit. Be eco-friendly by adding our safe fire-pit Lava Rocks. Made from tempered clear glass and fire-resistant up to 600, these lava rocks will not melt, break or emit smoke. Designed to be used indoor or outdoor with Propane Gas Fire Pits, they are a great replacement for glass logs as these add ambience and create a shimmer during the day and appear multi-coloured at night when the gas fire pit is in use. Perfect to give your firepit a touch of class. These Lava Rocks can also be used in aquariums and for landscaping. Can be easily cleaned with water and vinegar.