Like the one guy said, just look at what she wears now. Most all women are into jewlery.
I just got my wife a Tanzanite 3 studded ring and I picked out the one she was eyeing at the jewlery store the week before when she got my money clip. I just went in there knowing she liked Tanzanite and walked out with the ring she eyed and bought her a Tanzanite necklace as well. She was shocked! So was I when I layed the cash down! //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif
Also listen! If you listen, you can pick up on shit.