Most of the jewellery on display here is part of "kronjuvelerne" but we don't see them in use.

They are made by Anton Micheelsen 1907/08 in Copenhagen. It doesn't mention who place the order, but by that time Queen Lovisa was the user of kronjuvelerne. So my guess is, that it's made from loose pearls and loose stones from either Rosenborg or from her own collection.