Pile of coal. Fossil stone of black mineral resources. Polygonal shapes. Rock stones of graphite or charcoal. Energy resource icon. premium vector by the8monkey.gmail.com

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white vector object graphic element illustration isolated mine mineral stone facet heap sign nature environment abstract energy natural piece black power dark cut cartoon icon industry structure flat grey simple fuel material rock Pollution production geometry pile factory coal graphite resource fossil charcoal carbon gravel lump calorific combustible polygon polygonal

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