Unlike many industrial metals, minerals containing lead, silver, and zinc generally aren’t oxides of the metals. Rather, these three metals are far more likely to combine with sulfur ...

Precious metals like gold and silver are obvious examples ... and none of us would get very far without oxygen. But what about sulfur? Nobody seems to think much about poor sulfur, and when ...

Jewelry made of silver, while elegant and timeless, may start to darken as it ages. The most common cause of this phenomenon is sulfur oxide, a component in the air that reacts with silver.