Certainly not costume jewelry. To me it seems part of the Mellerio parure, re-arranged. The saphires seem to have the same colour as the ones in the parure and they appear the same shape. Also the diamond thingies between the saphires bear some resemblance to the spikes of the tiara.
--Previous Message-- : better photo: : : : : : : --Previous Message-- : In the meantime seen pictures... : And ofcourse live on tv... : I am not so impressed anymore. : Now I think it might even be custom-jewelery : : --Previous Message-- : And rather impressive I might add... : Looks a bit like the Swedish saphire /pearl : necklace. : Although I haven't seen it in a realy good : shot yet, I am amost shure it contains : family-saphires. : Maybe these are restparts of the broken up : 1901 weddinggift-parure? : : : --Previous Message-- : Queen Maxima wears a new collier tonight : : : : : : : : : :