Thanks to LorilieJames it is a Featherweight Cashmere J Crew Sweater in Pale Nectar
The closest ones I could find are the ones in light citron
http://www.jcrew.com/AST/Browse/WomenBrowse/Women_Shop_By_Category/sweaters/jcrewcashmere/PRDOVR~23241/23241.jsp
http://www.jcrew.com/AST/Browse/WomenBrowse/Women_Shop_By_Category/sweaters/jcrewcashmere/PRDOVR~21842/21842.jsp
Thanks to Nicole
I screen-shot the website to make it easier for everyone to find it.
Ring:http://www.infinitejewelryco.com/bella%27s-engagement-ring.html