If you send it registered mail, return reciept requested with USPS everyone who touches the package has to sign for it, then you get confirmation it was delivered.
I worked in a jewelry store, we mailed jewelry that was our merchandise (replaceable) Fedex but if it was a clients jewelry that we needed to send out it always went registered mail. This is the only way I will mail a quilt or anything else I really don't want lost.
Jo