Ceramic logs 

The highly durable ceramic fibers that construct each piece are ideal for indoor and outdoor use and can sustain temperatures up to 1000 degrees C. Great for All Type of Fireplace - Vented gas fireplace, Outdoor gas fireplaces, indoor gas fireplaces, direct vent, zero clearance, natural gas, gel, standard fire pits, fake fireplaces, electric fireplace inserts, propane fireplaces, etc