Torkel, this Hesse Diamond Jubilee Sapphire and Diamond Brooch was worn by the Duchess of Cornwall not only during official tours abroad (January 2007 in Philadelphia, USA; October 2008 in Tokyo, Japan; November 2009 in Newfoundland, Canada; March 2012 in Oslo, Norway), but also (at least) once in the UK: on Christmas Day 2013, as shown on the following picture:
Camilla, Duchess of Cornwall leaves the Christmas Day service at Sandringham on December 25, 2013 in King's Lynn, England. (December 24, 2013 - Source: Chris Jackson/Getty Images Europe)
Here is the best picture I have of this brooch, from the Royal tour of Canada in November 2009 (the same picture as the one posted by Joye, but without the overimpressions):