Yesterday, Queen Beatrix opened an art exhibition marking the 100th anniversary of the Frans Hals Museum in Haarlem, The Netherlands. She wore a sparkling black straw hat (it seems to be woven with metallic threads that gave it a little sparkle) with flat crown and upturned brim, also worn last April during the state visit of the President of Turkey. The crown shape on this hat is a little off for me, but I love smiley Beatrix in an upturned brim so I suppose I’ll give this hat a fashion pass. What do you think of this sparkler on Beatrix?
Photos from Getty as indicated
Royal Hats 
Also Princess Irene and Princess Margriet of the Netherlands, sisters of Princess Beatrix I like royal hats! Anneke
She shore is elegant in all her hats. Gone to miss her when she hangs her hat up for retirement.
While I wish Queen Beatrix a well-earned restful retirement, I have a hunch we’ll continue to see her (and her hats) from time to time. She is just too popular to be forgotten.
How can this be a straw hat? The brim and crown are connected by a sheer mesh that you can see in your second photo. The basis for this has is definately not straw but something akin to needlepoint stitching base.
It’s the woven texture of this hat that makes me think it’s straw. I suspect it’s straw woven with another material (a metallic thread or, as you mentioned, a sheer mesh of some type). Does anyone else have any idea of what material this is?