It is a high quality premium product. Gently tumbled to remove sharp edges. Very safe and easy to install. All of our Fire Glass is made with a unique tempering and filtering process resulting in jewel-like Fire Glass with superior clarity and higher heat resistance so as to remain brilliant and radiant for generations to come! Our Fire glass will not melt, degrade or emit toxic fumes. There is also no soot, ash or smoke. Perfect for your indoor fireplace, fire pit, outdoor fire bowl , landscape glass and more.