Are you sure it's rhodium plated? That's not mentioned in any of the descriptions and most of her videos that I'm trying to watch won't play. Is rhodium mentioned in her on-air presentations? I've only ever heard it mentioned if it was gold plated. Rhodium doesn't tarnish.
I saw this on her website and I'm sure it doesn't apply to her QVC jewelry:
Rhodium is a derivative of platinum and is often used to plate sterling silver, as well as white gold. The pieces in our 18k Couture White Gold & Sterling Silver/18k Gold Collections are plated with a very thin layer of Rhodium to help prevent tarnishing and scratching, while retaining the jewelry’s natural luster and shine.