[freakshow]

Before you get lost in bluenile.ca sliding all those filter bars up and down, go look at rings of various grades in person to get an idea of the actual difference between the 4Cs.

After that, you'll need to find a design that she likes.. that'll be the hardest part, unless you ask her directly.

Once you have the design and grade that you'd be happy with, you can finally go to bluenile to get an idea of price. Online is always cheaper. Other than that, you can shop around locally. I got my wife's ring made at Minichello downtown. Great service from start to finish.

As for the cost, spend what you're comfortable with.. if you feel you need to spend a certain amount or she won't appreciate it, she doesn't deserve it in the first place.

I certainly wouldn't limit yourself to a certain amount.. everyone has different budgets, and puts value on different things that aren't completely utilitarian. We are on Revscene after all, where most of us spend copious amounts of money on overnight parts from japan on cars that get 18L/100km..