My guesstimate:
Diamonds correspond to votes. In a free society the power resides with the people whose vote determines who gets elected. Tiffany’s is the premier diamond house in the world just like DC used to be the premier place symbolizing power of and for the people, before the votes aka diamonds were stolen in the 2020 election. Returning the stolen diamonds to Tiffany’s is saying return the stolen votes to the rightful candidates whom the people elected to DC. Return the power to the people.
That’s an excellent correlation. I think you’re onto something there.