With all that grandeur I need to remind myself that royal women of today would most likely look ridiculous with such giant stunners adorning their bosoms!!

There has been a huge shift. Power and great wealth went together and the ladies were expected to display that wealth in jewellery.
Today it is the billionaire celebrities who have great power - and wealth. Royal women now specialise in charitable and humanitarian causes, or the armed services.
The lack of well known major jewellery at the coronation of Charles III said it all for me. Intentional I'm sure. The three crowns were all that could be tolerated.