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):

https://www.alamy.com/stock-photo-swedish-queen-silvia-visits-the-university-of-leiden-in-leiden-netherlands-54515970.html?imageid=CE9F091E-A1C4-410E-8435-FC334D5050DD&p=191649&pn=3&searchId=805c0750d8b7e79d2f53d0d25518dd9d&searchtype=0

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):

https://members2.boardhost.com/royal-jewels/msg/archive/1436696619.html