I have this picture in my portfolio but as a entry in my State Visit category. In that context, I never took noticed the necklace.
This picture dates from November 6, 2001. This interestingly predates the passing of QEQM.
The next time we see the Crown Ruby Necklace is the State Visit from France in 2008 and then the State Visit to Germany in 2015.....it seems to have a 7 year cycle!