Granulated refractory brick is a block of refractory ceramic material used to line forges, ovens, fires and fireplaces. The rustic appearance of this brick is the result of its composition (based on chamotte), and the manufacturing process.

Chamotte is a type of aluminous silico material that is among the most widely used refractory materials, with a large number of applications due to its cost, performance and versatility.

Composed of 35% aluminum oxide (Al2O3) -alumina- and silica dioxide (SiO2) more or less in equal parts, although the ranges will vary depending on the specific type of chamotte, which is nothing more than fired refractory clay- it is used in all types of fireplaces and industrial ovens due to its excellent refractory properties.