🪨⬛🔥

#coal #hard coal #fossil fuel

🪨✨⚫️

#hard coal #lustrous coal #black coal #metamorphic rock #mineral fuel

⬛✨♨️

#anthracite coal #shiny coal #hard coal #heat source #black coal

💎⚫🔥

#hard coal #high rank coal #shiny coal #carbon

🥇🪨⚫

#highest rank coal #hard coal #premium coal #anthracite rank #carbon

C💎🔥

#high carbon fuel #hard coal #low smoke #high BTU #energy density