Posted by Arthur on February 28, 2015, 5:34 pm, in reply to "Empress's Brooch"
Here is a slightly larger picture. The brooch looks like a silver leaf.
(Credit: WPA Pool/Getty Images Europe)
I am not sure this brooch has a British connection. Empress Michiko owns a large number of brooches (often of modern design), either with gems or in metal, whose origin is not publicly known: