This is probably based on the Ranc portrait seen in the last image. The dress is made of gold brocade while her sleeves are adorned with jeweled arm bands.
Keywords: reina María Bárbara, rainha Maria Bárbara de Bragança, Queen Maria Barbara, Bárbara de Braganza, Barbara of Portugal, Bragança family, Borbón family, Princess, Queen, long curly coiffure, jeweled ribbon headdress, square neckline, under-bodice, modesty piece, lace, over-bodice, lapels, lining, close over-sleeves, tabbed sleeves, engageantes, earrings, jeweled arm bands, Sévigné bodice ornament, wrap