The AP report seems to indicate that many stones given to embassies made it into national museums but others may have gone missing long ago. Of an estimated 134 rocks brought back in the Apollo 11 mission in 1969 only around a dozen can be immediately located.NASA turned over the samples to the State Department to distribute and there is, according to the State Department historian, no record of what became of the rocks. At the time when the rocks were distributed no one imagined that it would be the last trip to the moon for decades.
Most of the material gathered by the Apollo missions remains under NASA lock and key. They give away small samples to researchers and lend rocks out for exhibitions.The gift rocks which were given out were very small and encased in plastic globes. Collectors are often interested in moon rocks but should know that buying the moon rocks from the Apollo missions is illegal. Anyone trying to sell you moon rocks is either lying about the provenance or has obtained the rocks illegally.