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They almost found nothing - then the mud gave up ruby and sapphire corundum

This trip starts with a long drive to North Carolina and a simple goal: find ruby and sapphire corundum crystals at Propst Farm. The site is an alluvial deposit, meaning the crystals have eroded out ...
New Scientist

Fluorescent ruby-like gems have been found on Mars for the first time

The Perseverance rover has found precious stones inside Martian pebbles. These gem grains are made of a substance called corundum, which is also known as ruby or sapphire depending on the traces of ...
Miami Herald

NASA's Mars Rover Is Hunting Ruby-Like Gems — and It Just Found Some on the Red Planet

A 'selfie' taken by the Curiosity rover taken on the Martian surface. Courtesy of NASA/JPL-Caltech/MSS Courtesy of NASA/JPL-Caltech/MSS For decades, Mars has surprised scientists with evidence of ...
Scientific American

Artificial Production of Corundum, Ruby, and Various Crystalline Silicates

If you enjoyed this article, I’d like to ask for your support. Scientific American has served as an advocate for science and industry for 180 years, and right now may be the most critical moment in ...