I think it would look good, but actually, I was quite taken with the original clasp and its matching pearl. I think changing the clasp would make it less edgy, but more blingy.
Ps If you don't want to send off for some kind of pearl shampoo, a regular, clear shampoo, is fine for cleaning pearls or liquid castile soap as in dr Bronner's. A few drops will do you in either case.