The stomacher ist form the 'Rosensten-saet' (Rosestone Set) from the Crown Jewels (as Tamara already pointed). Have a look at Rosenborg Slot's site about this jewel. Enjoy!
Question: is with the naming "rosensten" meant that the jewel is made of rose quartz or rose cut diamonds? Until today I always thought it is the latter, but since Rosenborg slot's website explicitely mentiones 'diamonds' with other jewels I'm not so sure anymore... But on Pedro's picture, the stones look clear/white, not the pink of rose quartz...
For the necklace - I guess, it could be the rivière of the Brillant set without the pendants (if they are removable...) and simply a bit blurry because this pic seems to be a still/screenshot from footage. I don't think it's the necklace from the Rosensten set, these stones seem to me too small compared to the ones HM is wearing on the picture.
--Previous Message-- : Does someone have more photos of HM wearing : it? It's such an impressive jewel. What's : its origin? : What about the necklace? It looks a totally : different one. : : : : Thanks in advance. :