This is essentially a close up from the last portrait, but not done with a camera or Photoshop. This Bronzino hangs in the Uffizi.
Upgrade image posted 5 October 2013 from the Web Gallery of Art; enlarged one quarter by gogm.
The way tassels are attached to the ruff are shown in this 1560 Bronzino close up related to the last image. This also shows the ruff could be part of her chemise or part of her bodice.
Keywords: 1560, Bronzino, Lucrezia de Medici (1545-1561), Medici family, Este family, Duchess, Italian, jeweled headdress, high neckline, collar, ruff, tassels, chemise, modesty piece, French sleeves, slashed sleeves, slashed bodice, earrings, brooch