Talk:Friends/@comment-174.21.188.44-20120529230550/@comment-4775325-20120529231342

You should get an announcement, it will appear either while you are playing or when you are loading up your game (for any that happened while you weren't playing). It will say something like has sent you a gem and then the gem will appear in your resources. If that is not happening you haven't been gifted any gems.