On July 20, 1969, President Nixon in the White House spoke to Apollo 11's Neil Armstrong and Buzz Aldrin at Tranquility Base. From the holdings of the Nixon library.
The moon rock that Neil Armstrong and his fellow Apollo 11 astronauts gave the Dutch turns out to be a piece of petrified wood. I'm assuming from the article that the possibility we discovered petrified wood on the moon has been ruled out.