Rasmussen 30" Calico Mix Alterna Ventless FireStones Single Sided - AFS30-CX introduces a unique blend of natural tones to your ventless fireplace, adding depth and warmth to any decor. Crafted from durable ceramic-bonded refractory material, this multi-tonal set is designed to withstand high temperatures without cracking. Ideal for concealing burners, the Calico Mix set complements rustic and transitional spaces beautifully. Compatible exclusively with Rasmussen Alterna Vent-Free FireStones Burners (sold separately).