Mars is hiding a clutch of ruby-like crystals in its rocks, observations from the Perseverance rover suggest, and astronomers say other precious minerals, like sapphires, could exist across the Red Planet, too.
An international team of researchers presented the findings, based on observations from spring 2025, March 16 at the 57th Lunar and Planetary Science Conference in Texas. These findings are currently under peer review and will appear in the journal Geophysical Research Letters.
