What mineral was first discovered on the Moon and later found on Earth?
Armalcolite is a gray colored mineral that was discovered in Moon rocks retrieved by the Apollo 11 astronauts on July 20, 1969. It was named for the three astronauts: Neil Armstrong, Buzz Aldrin and Michael Collins.
Armalcolite was later discovered on Earth in parts of the United States, Greenland, Ukraine and South Africa.
It has a chemical formula of (Mg,Fe2+)Ti2O5
(Photo courtesy of JPL/NASA)