The exhibition is well worth visiting - although the lighting is dim in order to preserve the jewels. To be fair they do have magnifying glasses there that help a little - but most of the pieces are quite small and hard to see. I should have taken my optivisor :-)
My main items of interest were the breathtaking enamel chains - just amazing.
Photography wasn't allowed so this is a picture I found on the web.
Here is a link to a really good article about the collection on the GIA website, including lots of informative videos: