To my eye, it looks like Queen Camilla's new non-pierced ruby earrings, worn last night with the Burmese Ruby Tiara at the Korean State Banquet could have come from this rather...voluminous necklace. Or potentially a pared-down version of the existing earrings.
I was thinkinig the same thing when I first saw the photographs emerging from the State Banquet. They look somewhat longer in the photo you posted compared to what they looked like during the State Banquet, so I suppose - if it is these earrings - maybe the middle section has been removed to shorten them a little bit. Kongetro