From artuk.org; removed spots with Photoshop and enlarged by half.
This portrait shows one way to achieve the 1830s waistline - surrounding a stomacher with a jacket laced across the stomacher.
Keywords: van Dyck, Queen Henrietta Maria, Henriette Marie de France, British, Bourbon family, Stuart family, Princess, Queen, British, proto-hurluberlu coiffure, hair jewelry, earrings, necklace, jeweled laced jacket, trapezoidal neckline, draped jeweled bodice ornament, elbow length puffed sleeves, lace cuffs, lace engageantes, stomacher, brooch, jeweled waist band, natural waistline, close skirt