Let me tell you what happened in my country with the moon rocks.
As a political game, the Government of the USA gave our then President a moon rock covered in acrylic, which the President decided to use as a personal souvenir. When the opposing party saw this opportunity they made a big scandal out of the President having taken the rock, and it ended in some shelf in some governmental institution, having served no purpose at all. In fact, there is no way we can find out whether that rock really came from the moon, or to research anything at all from it. It is most probably contaminated anyhow.
This political gamesmanship is a way the government of the USA has tried to earn something from the useless rocks, nothing more. Nobody can really know if the rocks are real, so the story of somebody finding out that they are fake seems quite a bit suspicious. Did he receive it covered in acrylic? Did he remove the acrylic protection and contaminate the rock to find out if it was a fake? Did he crack the rock to see the uncontaminated interior?
My guess is that the recipient of the rock decided to make some publicity for himself, not caring whether the rock was good or fake. If he really had a legitimate scientific interest he would have gone to NASA and presented a project proposal. They are the ones who have the scientifically useful rocks from the moon.