This image and this image are apparently derived from this portrait.
From Wikimedia.
Mary, Queen of Scots wears a black and white dress with a reticulated partlet in this Clouet portrait.
Keywords: 1578, Hilliard, Mary Queen of Scots, Mary Stuart, Stuart family, Scottish, Queen, straight coiffure, cap, partlet, high neckline, neckline ruff, outer ruff, veil, bodice, crescent neckline, long sleeves, earrings, necklace, pendant