A chemical and spectroscopic comparison of two purple gem spinel samples, one of them the first reported example of a spinel with a saturated purple color caused predominantly by chromium and cobalt.

By Jai Cunningham Click here for updates on this story South Korea (KITV) — Americans paused to celebrate Independence Day, but despite being far from home, one veteran who self-deported to ...

Ever wondered why Mace Windu’s lightsaber is purple when nearly every Jedi uses blue or green? This video breaks down the real-world reason from George Lucas and Samuel L. Jackson, along with ...