I thought those were the late QEII's clips. If I'm not mistaken Princess Margaret had the same set of clips except for rubies instead of sapphires.
https://www.thecourtjeweller.com/2024/03/queen-camilla-wears-the-late-queens-gold-and-sapphire-brooches-for-the-royal-maundy-service.html#more-53802
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