We recommend that you use 1–2 inches of fire glass to cover the burner, but be sure to not overfill your fireplace or fire pit. While fire glass is a great way to bring out the best in your fire feature, you can get even more ideas from our video on how to accessorize your gas fire pit.Click to see full answer. Correspondingly, what size fire glass should I use?When using Recycled Fire Glass, we recommend using either small (1/4″-1/2″) or medium (1/2″-1″) size glass. Reflective Fire Glass Collection is not available in any size other than 1/4″.Subsequently, question is, what color glass looks best in fire pit? Sky blue Reflective Reflective Fire Glass is ideal for all propane or natural gas fire applications. This fire glass pebble is richly colored to appeal in indoor and outdoor venues and is tempered to withstand the most extreme temperatures of fireplaces and fire pits. Furthermore, should fire glass cover the burner? Glass Coverage: Use enough fire glass to cover the burner but don’t layer the glass higher than 1/2” above the burner in propane gas applications. You can use slightly more fire glass in natural gas applications.Can I mix fire glass with lava rock?A popular new option is to blend lava rocks with fire glass. Each blend mixes two to three types of colored fire pit glass and lava rocks. The rustic natural stone is a perfect contrast to the brilliant reflections of fire glass.