The ring in the picture is not Queen Silvia's engagement ring. I remember reading somewhere that she got a classical diamond solitaire ring (app. 2 cts) which, either the stone or the whole ring, was inherited from the King's late mother. There haven't been any really good pics of the ring.
to bad there is no good photo of the engagment ring
I think that the floral earrings Queen Silvia wore in Brunei and CP Victoria at the Spanish wedding are quite old. The style and the setting in the largest stones look very archaic. But I would assume that this old earrings would have hooks and not sticks... Hm, maybe they have been modified a little.
i would love to see some close up photo of this earing
I have a question. Which of the tiaras are personally hers? Which ones were given to her by her husband? I thought they were all part of the family foundation that she borrows from.
Maybe an expert can answer that, I can't give you the complete answer, but I know a little. And I think that the jewellery that are not part of the Bernadotte Foundation will continue to be within the Royal Family, so they're not really Queen Silvia's private in the sense that she can give, sell or testament them away. At least not the tiaras and major pieces of jewellery.
There are quite a lot of personal jewellery in the Royal Family (that doesn't belong to the Bernadotte Foundation), among them are:
The King Edward VII's Ruby Tiara
The Connaught Diamond Tiara
The 10th Wedding Anniversary Diamond Tiara/The King Carl XVI Gustaf Tiara