Other forms: brimstones
Brimstone is an old-fashioned word for sulfur, a chemical that's used to make matches, among other things.
Brimstone is derived from the Old English brynstan and a root meaning "to burn." These days, few people refer to the non-metallic chemical element sulfur this way, but are more likely to use the word in the Biblical phrase "fire and brimstone." The burning smell of a lightning strike — and the association of lightning with divine punishment — produced the connection between burning sulfur, or brimstone, and God's wrath.