Corundum, the crystalline form of aluminium oxide, is the host mineral for the gem varieties ruby and sapphire. Characterization of corundum deposits involves geological classification, mineralogical ...

In 2023, NASA's Curiosity rover found opal on Mars. Now Perseverance has added some new gems to the list.

"There are aluminium-rich outcrops elsewhere on the planet and there are impacts, but I thought it was very shocking to see ...

NASA’s Perseverance rover recently uncovered tiny, fluorescent mineral grains inside Martian rocks. According to New ...

“At the Corundum Hill Mine (near Highlands), various shades of ruby gem corundum have been found,” the U.S. Geological Survey reported in 1906. However, though the gems were similar to the red rubies ...