Investiture at Buckingham Palace

November 21: The Queen held an Investiture at Buckingham Palace.

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A post shared by The Royal Family (@theroyalfamily) on Nov 21, 2019 at 8:09am PST

I haven't seen a view to allow for brooch guessing from this event, but we can dream of sapphires anyway.

Queen Mary's Button Earrings

Three Strand Pearl Necklace

Gold Watch

Engagement and Wedding Rings