It could be bronze.

可以用古铜色。

youdao

The sky over your head will be bronze, the ground beneath you iron.

你头上的天要变为铜，脚下的地要变为铁。

youdao

We are talking about the Neolithic period here, which was the time before stone tools began to be replaced by tools made of bronze and other metals.

我们这里在说的是新石器时代，是石器开始被青铜和其他金属制工具所取代之前的那个时代。

youdao

In the end,all there will be is a giant puddle of water, the bronze skeleton and plaques a kind of testimony to the crisis of climate change.

VOA: standard.2009.12.13

I said bronze, but actually the tip was usually iron, but it could be bronze as well.

虽然我说矛头是铜质的,但其尖端大多是铁质的,也有铜质的

耶鲁公开课 - 古希腊历史简介课程节选

Some of the sites that are said to be destroyed by Joshua and the Israelites weren't even occupied in this period, ; the late Bronze Age, beginning of the Iron Age; the Iron Age begins around 1200.

据说一些遗址已被破坏,被约书亚，以色列在那时还未被攻占，在铜器时代晚期，铁器时代的初始;,接触器时代自1200年左右开始。

耶鲁公开课 - 旧约导论课程节选

It has to be out of bronze of marble, and it has to be of someone who's deceased.

NPR: A Quick Trip Through the History of Capitol Hill

John Sheriff, an investigator with the Royal Commission on the Ancient and Historic Monuments of Scotland, said it was impossible to date the stone precisely but it is very likely to be neolithic or Bronze Age, and could "easily" be 4, 000 years old.

BBC: Human remains found in Bronze Age pots

The United States will be awarded the bronze medal instead, the IOC said in a news release.

CNN: China stripped of 2000 Olympic bronze