Great photos of the Baroness wearing her sapphires (and of Lady Marsha and Cecilia Colacicchi)! Thank you The Royal Watcher! The modern photos certainly allow us to appreciate the necklace in all its glory.
Below she can be seen at a concert at Crewe House wearing the pendant as a pendant to the large star brooch which she wore regularly.
I suspect that, on her left shoulder (on the right as we look at the photo), she is wearing the tiara element as a brooch.
A better view of the star brooch and her earrings.
The photos of the Baroness in her peeresses robes show even more jewels. The stack of bracelets is impressive! As is the trailing, diamond bodice ornament. The photo was taken inside Carlton Towers, Yorkshire; yet, even though all the photo agencies say it was taken either in 1948 or 1947, I wonder if it was taken at the time of the 1937 coronation?