Something thoughtful and simple........... not too expensive or fancy...... just something very thoughtful that she can use in her daily life.............
If you only like here as a friend only .............. do not buy her jewelry, flowers, or anything romantic, cloth or anything considered personal or thoughtful.... instead get her something plain and very weird LOL j/k
like a book, calender or puzzle or bottle of perfume an empty photo album lol something normal so she won't get any romantic ideas....................hmmmmmm or a nice wine glass, or a fruit basket... or one of those in store gift basket........
But if you have a crush on her do something thoughtful like book an evening out at a restaurant, or go to the photo print shop and frame her photo make it look nice and give it to her.......
or if its just the beginning of a relation just buy a simple flower, or if you have talent do a drawing of her....... or a photo album containing all the photo you took with her and friends................
well that what I know from observing what my brother does lol