The first gown we see the grown up Elizabeth Swann in is a gorgeous gold gown given to her by her father. The details and fabrics are exquisite! I look forward to one day making this dress! I am not going to go into great detail of the dress here since there are already some great costume studies on this dress which I will refer you too, but let's take a look!
'Bring Me That Horizon, The Making of Pirates of the Caribbean' By Michael Singer, describes this gown as follows: "Reproduction eighteenth-century material, a silk taffeta that's so light that when its made it doesn't feel enormous. I think the overall effect is that while this is something that a father might wish for his daughter to wear, it's not necessarily what a daughter would particularly choose."
The stomacher is intricately beaded: There is a great diagram of the beading by Anna O. HERE.
The back of the bodice:
Elizabeth's fan is decorated with little sequins (and yes sequins are historically accurate!) And a pretty lace trim.
Costumer's Guide's page, there are notes from the exhibit, pattern reviews and lots of great high resolution photos! I also recommend The Peacock Manor's page on her replica of the costume...she has some great pattern ideas and notes!