The golden jeweled bracelet is a ter'angreal in the possession of Nynaeve al'Meara. It was recovered from the Kin's Storeroom in the Rahad district of Ebou Dar.
It is described adorned with fine red stones.
Nynaeve tells Rand and Lan that this ter'angreal gives her armor better than steel. We can guess that its function is very similar to Cadsuane's six-pointed star ornament