falling rocks on white background. black charcoal or coal on white background. for cover, card, postcard, interior

black block falling coal flying stream debris piece stone abstract background cobble cobblestone rock rough mineral shape carbon charcoal closeup explosion geological scrap crushed shattered heap splinter segment fragment design solid boulder rubble fuel anthracite chunk combustible industry raw broken ruin collapse natural motion granite gravitation illustration rocks white background for cover card postcard interior decor print