

The crown was later found on the pavement, there are a few earrings and pendants still to be found. For the values of the gems: gems from that time often have quite a crude cut by today’s standards,and they are not individually of a high value. As with tea sets, it’s the full original set that has priceless value. The more you break it into bits, then individual gens, the more the value goes down.
Clearly not a pink panther level job, though kudos for the ballsy heist.

None of that matters, what matters is engaging up to the level of trust. To german eyes, as most European eyes, both are now interchangeable ethically. So commerce has to be done on the basis of numbers, not ethics.