You also miss the point. Point being what business is it of the government if you're transporting valuables, currency, etc.? By saying you should show provenance, then you're automatically granting that the government has the right to control what you own and how much money/valuables you can carry etc.
I did not miss the point. You just don’t find rough diamonds like that. They are traded through tightly controlled channels and only certain brokers would have access to such a large amount of product.
At the Port of Entry (or Exit), they do.
Ever wonder why searching luggage at a Customs station in the airport isn't a violation of the 4th Amendment?
If the diamonds were legal, the lady would've declared them. She didn't. Thus, the quite logical presumption that they are coming into the country for an unlawful purpose.
I agree with you. What business does the government have in monitoring what assets we bring into and out of the country?
Do you believe there should be tariffs on foreign goods brought into the country for sale, say for example goods mfg. in China and brought in and sold at Wal-Mart?
If you do you just defeated your own argument.
Constitution of the United States:
Section. 8.
The Congress shall have Power To lay and collect Taxes, Duties, Imposts and Excises, to pay the Debts and provide for the common Defence and general Welfare of the United States; but all Duties, Imposts and Excises shall be uniform throughout the United States;