Briquettes

A briquette is a compressed block of coal dust or other combustible biomass material used for fuel and kindling to start a fire.
A briquette (also spelled briquet) is a compressed block of coal dust (Speight, 2013) or other combustible material (such as charcoal, sawdust, wood chips, peat, or paper) used for fuel as well as for kindling to start a fire.