--Previous Message-- : I wonder whether this emerald could have been : substituted for the Koh-i-nor diamond in : Queen Mary's crown, if she had decided to : wear her crown in India. It looks as though : it might fit. In any case, it could be worn : as a brooch or inserted into the tiara. : ----------------------------------------------
The brooch was given to Queen Mary at the Durbar, so the answer has to be no.