What did medieval queens wear?
Most of the people wore woolen clothing with undergarments of linen. The only difference between a peasant and a queen was the cloth was better, brighter colors, and a longer jacket with the greater wealth. Women wore flowing gowns and head wear shaped like hearts or butterflies to tall steeple caps and Italian turbans. Fur was used by wealthy and jewelry was expensive and imported. Gen cutting wasn't invented until the 15th century so most stones didn't shine and sparkle. Ring brooches were the most popular item from the 12th century on. Diamonds became popular in Europe in the 14th century and by the mid-14 century there were laws to control who wore what jewelry. Knights were not permitted to wear rings.
Queens in the earliest medieval times had no more dresses than an ordinary modern woman would. In fact I would bet some had only two, one to wear and one to wash. But then some queens were confined to convents. Things got better for women in general as the Middle Ages passed. I have read the when Queen Elizabeth I died, she had many hundreds of gowns.