Facts: AA found a jewel and took it to BB's goldsmith shop where BB's apprentice removed the jewel under the pretense of weighing it, and informed BB of its weight. Then BB offered the AA money for it, but the AA refused and insisted upon the return of the jewel, at which time the apprentice returned the empty setting without the jewel in it to the AA .
Issue: Does AA , in finding the jewel, have sufficient property right in it to keep it from the BB?
Holding: Yes. A finder obtains exclusive property rights of his find against all others except the rightful owner.
Reasoning: Although unstated, I believe the reasoning to be that if the finder was not protected by the right to exclude others from taking his find, simply because it was previously unowned, that there would be no incentive to the discoverer to bring the found item to a socially useful purpose.
Note: The court awarded the AA damages amounting to the value of the finest jewel that could possibly be mounted in such an arrangement, because BB was unable to produce the actual jewel for return to the AA .