It's the Restoration and Henrietta Maria is back wearing a gorgeous jeweled gown in this 1660 portrait by Sir Peter Lely.
The Wikipedia article for Sir Peter Lely is here.
Her dress appears to have sleeves that are puffed and slashed to either reveal her chemise beneath or adorned with puffed cloth ornaments.
Keywords: 1660, Lely, British, Stuart family, Bourbon family, Queen, Queen Henrietta Maria, curly coiffure, bateau neckline, crown, necklace, earrings, jeweled neckline, jeweled sleeves, jeweled crucifix