That’s one small vial… and one potentially giant piece of litigation.

A woman filed a federal lawsuit against NASA last week, in a preemptive legal action to keep the moon dust she said Neil Armstrong gave her as a gift when she was a little girl.

Laura Murray Cicco was given a glass vial with a rubber stopper filled with gray dust with a note: “To Laura Ann Murray, Best of Luck, Neil Armstrong Apollo 11.”

Cicco, now 55, contends in the lawsuit that she found the vial and the note after her parents passed away.

Armstrong was friends with Cicco’s father, Tom Murray, who was an accomplished pilot during World War II, according to the court documents.

The reason for the suit was that NASA has taken the position that any material that has come from the moon are the property of the space agency, according to the lawsuit.

But the suit contends that Armstrong legitimately gifted the then-10-year-old girl with the memento.

“Astronaut Neil Armstrong gifted the vial of lunar dust at issue to Laura Ann Murray, now Laura Murray Cicco, when she was a child, and she is the rightful and legal owner of the vial and its contents,” the suit states. “There is no law against private persons owning lunar material. Lunar material is not contraband. It is not illegal to own or possess.”

News of the suit was first reported in The Washington Post. The newspaper points to a previous lawsuit.

The material was assessed by both X-ray fluorescence spectroscopy and X-ray diffraction spectroscopy. The XRD mineralogy assessment determined it was consistent with lunar regolith, although the XRF results revealed something more similar to Earth.

“At this point, it would be difficult to rule out lunar origin,” writes the scientist in his report, included as an exhibit to the suit. “I am speculating, but it may be possible that some dust from the earth became mingled with this likely lunar sample.”