A briquette is a block of combustible material that is used as a fuel to start and maintain a flame. The most commonly used briquettes are coal briquettes, charcoal briquettes, peat briquettes, and biomass briquettes.Briquettes are made by pressing and drying a mixture of ingredients into hard blocks. This method is commonly used for coal that has low calorific value or coal flakes in order to have additional selling value and benefits. Briquettes are used in industry and households. The material used for the manufacture of briquettes should have a low water content to achieve a high calorific value. The presence of volatile materials also affects how fast the rate of briquette burning; Materials that have high volatile materials will burn out faster.