The birthday gala was a private function and abroad so it remains to be seen if and when Amalia joins her parents during their official duties. If she's anything like her grandmama I am sure we'll be seeing a lot of her, bejewelled and otherwise. I agree that not all jewels will look good on Amalia. Especially when insisting on wearing long hair....
Perhaps some of the tiara's need to be widened for her. But so does the newly acquired tiara for the Duchess of Brabant... such a pity they turned it into a circlet on top of her head. It looked Barbie-esque just like Amalia. Anyway she needs to chose carefully. I think the diamond bandeau will look stunning on her.