from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. An orthorhombic mineral first discovered on the Moon.
From the names of astronauts Armstrong, Aldrin, and Collins + -ite; it was discovered by the Apollo 11 crew. (Wiktionary)
Among the substances the rock could contain is armalcolite, a mineral first discovered on the moon and named for Neil Armstrong, Buzz Aldrin and Michael Collins, who was on the Apollo 11 lunar mission crew.