cobalt blue reflective fire glass

Common sizes listed are 3/4 inch (19.05 mm), 1/2 inch (12.7 mm), and 1/4 inch (6.35 mm).

The glass is made from quartz sand and is commonly described as tempered or crushed tempered quartz, which improves heat and impact resistance.

Rinse the glass with water or a 1:1 water-and-vinegar solution to restore shine, then let it dry completely before reuse. The pieces are compact and easy to store in a dry container.

A typical recommended fill depth is 2–4 inches for best flame effect and coverage.

Common uses include gas fire pits and fire tables to conceal burners or pipes and enhance flames. It’s also used for decorative applications such as aquariums, gardens, and other ornamental settings.

Common styles include crushed tempered pieces and flat-round shapes; descriptions often call them reflective crushed tempered or flat-round fire pit glass.