On 1st July, 2011, King Philip and Queen Mathilde of Belgium (at that time still Crown Prince Philip and Princess Mathilde, Duke and Duchess of Brabant) attended a concert by Jean-Michel Jarre at Monaco's Port-Hercule, as a part of Prince Albert II of Monaco and Charlene Wittstock's pre-wedding celebrations. On that occasion, Princess Mathilde wore a pair of impressive earrings matching her green dress.
I do not remember if we have already discussed these earrings. Do you think these are real emeralds? Or rather costume jewellery?