Throughout 1935-36 Queen Elizabeth the Queen Mother, as Duchess of York, favoured pinning brooches over her pearls, usually on the left side of her necklace. Initially, I used to think that she used these items as clasps, later converting them to brooches.



That was until I saw this image.



Below is an enlargement from the photo. To my eye it shows that the twin emerald brooches are pinned over the pearls.



I have deduced that the twin brooches are emeralds because HM wore them at the same time as she wore Queen Alexandra's emerald earrings as pendants on her pearls.



I think that QEQM also wore them at her waist line during the South African tour of 1947 when she wore the brooch I refer to as her emerald palm tree brooch.





I suspect that QEQM also wore her small ruby brooch over her pearls in the 1935-6 era.