Personally I don't see how the brooch is so out of character with say this Jar Gardenia ring, especially if it were a designed piece. If you were designing jewellery for a special lady in her 80s you would tend to design something more traditional than modern.
Anyway lets hope Ianusk can get an answer.
--Previous Message-- : It is in the big catalogue from the show at : Somerset House in 2002 (from memory!), if I : can I will photo it and post! :