The Sinking Dress
Evidently, this is the dress Rose wears during the sinking (from the time she goes out of her bedroom, dressed back up after Jack has drawn her, to the time she is back in New York).
It is more complex than it looks, since there are many dresses/overdresses and such. It is made of satin and a lot more fabrics.
Professionals can make you a reproduction of this dress for about 500-600$, but my mother bought a pattern and all the materials (not the original ones, but looking quite the same and of as well as possible the same color) and it costed only 80$...
