Hmm, that doesn't surprise me -- I think that was vaguely the impression I'd got already.

Wasn't there some newspaper story about the (new) Princess of Wales wearing earrings to the funeral that had been bestowed on then-Princess Elizabeth by some foreign monarch at the time of her marriage? I'm not sure if that sort of thing counts as private jewellery or Crown Jewels, as it wasn't exactly a personal gift in the first place -- but presumably passing them on to the wife of the heir to the throne is a different matter from giving them to your bonne-amie...