'Bronze' in the Bible

Their legs were straight, and the soles of their feet were like the hooves of a calf, sparkling like the gleam of polished bronze.

And I saw six men coming from the direction of the Upper Gate, which faces north, each with a war club in his hand. There was another man among them, clothed in linen, with writing equipment at his side. They came and stood beside the bronze altar.

Javan, Tubal, and Meshech were your merchants. They exchanged slaves and bronze utensils for your goods.

He brought me there, and I saw a man whose appearance was like bronze, with a linen cord and a measuring rod in his hand. He was standing by the gate.