Interesting is that Queen Beatrix will probably be the first Orange-Nassau chef (or spouse of the chef) since Mary Stuart whom has not worn any item of the most important house diamonds or a complete parure (except the aquamarines).
It is often said: the Stuart Diadem is too ostentatious (it can be worn in a smaller setting), the Stuart diadem is too heavy (the Queen has worn other heavy diadems) etc. But also the bow brooch, the thickstone diamonds necklace, the large diamond-and-ruby stomacher, the complete Bracelet of the Colonies, etc. etc.