|The Emerald and Diamond Celtic Knot Brooch|
*Thanks to J-F for posting a photo of this on the Royal Jewels of the World Message Board, and to Franck for calling attention to it here and adding additional potential provenance info. Thanks to others as well for more information on past appearances of this brooch.
27 November 2015: Visit to Malta, Day 2, Audience
8 April 2014: State Visit from Ireland