The 1934 portrait of Queen Mary by Oswald Birley. Queen Mary was wearing her diamond Lover`s Knot brooch, her chain link choker, that can be divided in half to make two bracelets. (As the Queen now uses them) & her "signature" diamond sautoir, long necklace.
HM Queen Mary wearing her crown (without arches), diamond stud earrings, five diamond collet necklaces, Queen Adelaide's brooch surrounded by the two sides of the Cockade brooch, her diamond bar brooch on her shouder, and a brooch (circled in red) now most certainly converted into a pair of earrings by her grand daughter Queen Elizabeth II (you can see them here: http://www.pinterest.com/pin/541909767636730422/ ).
The 14 Diamond Bar Brooch. Queen Mary (1867-1953) used a brooch with 14 diamonds set in two even rows of 7, but it is unclear whether it was created specifically for her or if it has another provenance entirely. Below: Queen Mary using the brooch to secure her sash, purely as a decorative brooch, and on the shoulder of her sash. https://www.royalcollection.org.uk/collection/search#/44/collection/2808204/queen-mary-1867-1953 http://carrolltrustcase.com/uncategorized/50248/