This portrait appears to be related to the famous Ditchley portrait also by Marcus Gheeraerts.
Keywords: Gheeraerts- Marcus the Younger, Tudor family, Queen Elizabeth, English, Queen, square neckline, neckline ruff, lace, jeweled outer ruff, crown, hair jewelry, jeweled hanging sleeves, long puffed sleeves, back-flared cuffs, revers, stomacher, girdle, deep vee waistline, French farthingale, over-skirt, necklace, draped necklace, earrings, jeweled bodice ornament, jeweled neckline, jeweled sleeves, jeweled bodice, jeweled skirt