My boyfriend gives me 2 lower priced but real (ie gold with diamonds/genuine gemstones) for my birthday, our anniversary, and holidays. I don't want him to spend a lot of money now... save it for the the engagement ring!
My parents give expensive diamond jewelry for milestones like graduation from college and grad school (solitare earrings/tennis bracelets), and less expensive, but very nice jewelry from Tiffany's (silver collection) or Ross Simon's gemstones.
I buy myself costume jewelry, but when I earn my first big promotion and salary increase, I plan on buying myself a right-hand diamond ring to celebrate. I wish I was in the financial situation to buy myself more jewelry. I don't like waiting on a man!