<B>Stanbroil Lava Rock Granules - 10 LB. Bag. </B><br><br> <B>Features:</B><br><br> - Withstand extremely high temperatures without sustaining any damage or crumbling.<br>- Adds realism to your fireplace.<br>- Can works well with optional rock wool and glowing embers.<br> - Works with both Natural Gas and Propane appliances.<br><br><B>Installation:</B><br>Use as a neutral bass layer, then top with logs or fire glass.<br>Granules can be used on the fireplace floor around your gas log set for added ambiance and realism.