«Portrait of a diamond woman», Regency time

«Portrait of a diamond woman», XVIII s.
Oil on canvas depicting a woman dressed in the hurluberlu at the Anne-Marie d’Orléans (sister of Philip II of Orleans the Regent) decorated with pearls and holding a diamond.

Is the woman in our portrait the Regent’s favorite or perhaps the very personification of the Regency time.

Height with frame: 99 cm
Width with frame: 79 cm
France
Period: XVIII century, Regency

“Allegory of sight”, 18th century

Oil on canvas representing the allegory of sight.

This painting is actually composed of two paintings attached and relined. Was it a diptych or a series of several paintings, two of which would have been joined together?