Shree Hari Group of Companies supplies Combustible Black or Brownish-black Coal. Shree Hari Group of Companies offers ferrous and non - ferrous metal scraps, petro chemicals, cement and cement clinker, coal and paper scrap. Combustible Black or Brownish-black Coal is a fossil fuel formed in swamp ecosystems where plant remains were saved by water and mud from oxidization and biodegradation. Combustible Black or Brownish-black Coal is a sedimentary rock, but the harder forms, such as anthracite coal, can be regarded as metamorphic rocks because of later exposure to elevated temperature and pressure. It is composed primarily of carbon along with assorted other elements, including sulfur.