I too think they are modern, and possibly part of the set of jewellery that depicts grapes. Queen Margrethe has a number of pieces and she wore some when in the UK at the time of the Golden Jubilee (I think).
--Previous Message-- : Even if royal watching these hours are : pre-occupied with the news from Spain, I : dare a jewellery question : : At yesterday's command performance in honour : of Prince Consort Henrik's 80 birthday, his : Queen wore a necklace and earrings of what : looks like gold, pearls and maybe rubies. It : looks like modern pieces. : : The jewelleries might very well have been : discussed here previously but I have : searched with no luck. Do we know something : of the provenance of these pieces? :