This spectacular gown was created by Elizabeth Waller for the magnificent BBC mini series Elizabeth R. The costumes would eventually win Waller a much deserved Emmy for best costume design.
This gown, which appears quite different depending upon the lighting - has been used in four known productions, including Elizabeth R, the Documentary Elizabeth: The Acclaimed Saga of England's Virgin Queen, the Documentary The Six Wives of Henry VIII, and then again in The Tudors. It was finally put up for auction at Bonhams this year along with several other gowns from the production Elizabeth R.
The gown is described as "A gold coloured gown, of brocade, including bodice, skirt and kirtle/forepart, the boned bodice, heavily decorated with gold braid, pearl effect beads and rhinestones, the skirt of yellow coloured cotton, edged with matching embroidered brocade, and the kirtle/ forepart of gold brocade, together with a brown and gold brocade skirt" and eventually sold for £540.
You can visit the original auction page here, or I've saved a screenshot of the auction for future reference here.