The necklace/tiara also comes with a matching set of drop earrings.
This is the first time in a few years, Charlene has been seen wearing an item of jewellery from this set.
The pendant was the star of the show, as the Princess chose a dark dress for the occasion.
It featured an open neckline, with a wide collar that had ruffles underneath the lapel.
These ruffles cascaded down the centre of the midi dress.
It had three-quarter, a-symmetric sleeves too.