Description:1. The fire glass rocks are made of heat stability glass, with corrosion resistance, specifically designed to withstand high temperatures and provide exceptional durability.2. High Luster Effect: The fire glass rocks feature a high luster reflective surface, enhance the ambiance, create a mesmerizing play of light, withstand high temperatures, long-lasting and cost-effective.3. To use the fire glass rocks, spread them evenly over the designated area in your fireplace, fire pit, or decorative bowl. Ensure the rocks are placed on top of the burner or heating element, allowing the fire to pass through and create a mesmerizing reflective effect.4.