I have tried to find a better photo of this brooch, but it is hard to find any good photos of it. From what I can see it is not a brooch that is really worn that often, so there is a less chance of finding any up close photos of it.
Queen Silvia did wear it during the 2009 State Visit to the Netherlands and I believe that your photo is from that outing.
Alamy has a sort of close up which you will hopefully see using this link (I was not able to post the photo directly unfortunately):
There was a short post on this brooch back in 2015 and in the thread our fellow poster Arthur suggested that this might also come from Baden (which I find very likely):