Segmentation by type distinguishes the raw material origins and processing pathways that generate solid cylindrical briquettes. Biomass‑derived briquettes dominate, split into sub‑types: wood waste (sawdust, bark) and agricultural residues (rice husk, corn stover), together comprising roughly 55 % of production because of abundant feedstock and favorable energy density. Coal‑derived briquettes, formed from fine coal particles bound with binders, hold about 20 % of the market, serving legacy coal‑heavy applications where retrofit to biomass is limited. Municipal solid waste (MSW) briquettes, generated from sorted organic fractions, account for 15 % and are expanding in regions with strict landfill diversion policies. Industrial by‑product briquettes, such as those from paper sludge or steel‑making dust, contribute the remaining 10 %, offering a niche solution for waste‑to‑energy projects. The relative weight of each type is governed by feedstock availability, logistics cost, and the calorific requirements of end‑use applications.