From the Bonham's Web site; all of the dark areas had to be shampooed with Photoshop to remove the numerous spots.
The miniaturist could have used any number of portraits upon which to base his portrait of Queen Henrietta Maria.
Keywords: Queen Henrietta Maria, British, Bourbon family, Stuart family, Queen, curly coiffure, trapezoidal neckline, bertha, lace, natural waistline, necklace, earrings, cameo