As a student of NBC (Nuclear, Biological & Chemical) warfare many years ago, I am wondering what kind of contaminants may be on the outside of the seed packet and inside of the shipping package?
And why would anyone abroad trying to introduce NBC material in this country do so by placing mysterious, attention drawing, seeds, which have clearly been introduced into this country in violation of Federal law concerning agricultural imports, in a package marked jewelry? Why not just put 50¢ of costume jewelry in the package?
I think it more likely this is a shipping foul up, with a decent chance that a seller in China ships seeds to US customers in envelopes marked "jewelry" to evade Federal law on agricultural imports, and give their customers some measure of deniability if the shipment is discovered.
Put on your Level 4 MOPP gear...