Recently, I posted my opinion that the tiaras worn by Queen Mary featuring the Delhi Durbar Ladies of India brooch and the one featuring a large sapphire in the centre were different tiaras. (I am referring to the tiara with a large sapphire which some attribute to the Dowager Empress Marie of Russia)
I have done more research on the internet.
I would like to acknowledge that Ursula, on her Royal Magazin site, has previously published the same opinion.
I hope that we are both correct. If we are, then the credit should go to Ursula.