What's your process been for cleaning everything you didn't buy over, Marconis? Maybe we can help there. Were you able to try any salt?
The test I used was to rub my finger against the glass of the aquarium. It should rub and make that noise and show friction.
I remember that my rainbow rock must have gotten a lot of air in it, because when I put it in the sanitized tank, little tiny bubbles rose from it, and really scared me. But it must have really been air, because I didn't feel any loss of friction.
This bucket that you mentioned felt the same, is it the same one you've been using to rinse your things? Could you try getting a rinsed off glass of water, and doing that comparison with your tap vs. tank?
I believe there is a way to restore some of the items without having to buy all over again, but I know for me, it was a more gradual process, taking over a week. It just really tests your patience.
Are you still suspicious of the rocks, after the test? Or do you think it could be somewhere else? Did you sanitize all the wires coming out of the appliances that would have been submerged, etc?
Don't give up!