Portrait of Maddalena Doni, by Sanzio Raffaello, 16th Century, 1505, oil on panel, cm 63 x 45 x . Italy, Tuscany, Florence, Palazzo Pitti, Palatine Gallery. The pendant worn by Maddalena Doni has several meanings the unicorn symbolizes chastity the emerald possesses thaumaturgical powers and recalls the virtue of Chastity, the ruby conveys physical strength and gives prosperity to whom wears it, the sapphire is a symbol of purity and the pearl a symbol of virginity.