the empress sat upon the stool on the dais : a tall and slender woman with incongruously broad shoulders , she wore a deep scarlet turban with feathers thrust into it , bound in gold , and her very long black hair hung down in plaits clasped with gold and emeralds ; her garments were of wool of extraordinary fineness , splendidly woven in small patterned squares of bright colors , and ornamented with jewels .