From Wikimedia; image made lighter by gogm.
This enlargement shows Alathea Talbot's pearl tiara and a square jewel in her curly hair.
Keywords: 1620, Rubens, Alathea Howard, Alethea Howard, Alathea Talbot, Alethea Talbot, Countess of Arundel, Talbot family, Howard family, Countess, British, curly coiffure, tiara, hair jewelry, ruff, lace, necklace, earrings