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A gold ingot is sometimes also known as a gold bullion or a gold bar. It's a quantity of refined metallic gold, made by a trained bar producer.
Natural shea butter, nuts and green leaves isolated on white
Vertical steel tank for storing petroleum products and flammable liquids. A park for storing petroleum products. Lightning protection device on tanks. Gasoline production.
Process of copper refinement in electrolysis bath at plant
Industrial revolution, energy and technology concept,The equipment of oil refining, industrial equipment pipelines of an oil-refinery plant, Detail of oil pipeline with valves in large oil refinery,

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