Just a darn interesting story - and... "Were it legal to sell one, a one-gram moon pebble (less than 4/100ths of an ounce) would fetch $1 million or more":

In Malta, a moon-rock caper | csmonitor.com
By Mark Clayton | Staff writer of The Christian Science Monitor
'I would not be surprised if half of those 135 moon rocks have been stolen, or lost, or are now in a position where they could be stolen.'- Joseph Gutheinz, retired NASA investigator.

Sam Spade unraveled the mystery of the Maltese Falcon. Now his nonfictional alter ego is snooping into a real treasure-gone-missing caper: the Maltese moon rock.
Only about the size of a pea, the dull-gray specimen was plucked from the lunar surface by Apollo astronauts, embedded in a clear acrylic ball, and given to Malta. Last month, the acrylic ball and rare rock inside it disappeared from its display in a Mdina museum."

Read the Full Story >>