There was some sulphur inside of the rock and it happened in July 2024 (sic!), for some strange reason the info is making rounds now some 17 months later

https://www.nasa.gov/missions/mars-science-laboratory/curiosity-rover/nasas-curiosity-rover-discovers-a-surprise-in-a-martian-rock/

“Finding a field of stones made of pure sulfur is like finding an oasis in the desert,” said Curiosity’s project scientist, Ashwin Vasavada of NASA’s Jet Propulsion Laboratory in Southern California. “It shouldn’t be there, so now we have to explain it. Discovering strange and unexpected things is what makes planetary exploration so exciting.”

Hooked me. But the video is 75% stock footage, an anodine female voice and light jazz.