They are more costly than a gift basket full of chocolates, without a doubt. They are also a fairly serious gift, and a major show of commitment, so if you aren't willing to step things up a little, shy away from the diamonds and go with the chocolates.
But for that special someone that you think you just might want to keep around you until you're old and gray (or maybe you're already old and gray, and that special someone is still with you) a diamond can be a very special gift.
Diamonds come in many shapes and sizes. They also come in many different types of jewelry. You can spend anywhere from less than $200 all the way up to "You paid HOW MUCH for that thing?" What you choose will depend largely on your tastes (and probably, more importantly, the tastes of your lady friend) and your budget. The tastes I can't help you with, there are far too many to choose from. The budget, however, I can do something for. I have managed to secure a special link from Ultra Diamonds for 20% off Jewelry, just in time for Valentines Day. Click on the link below to take advantage of this special offer:
Ultra Diamonds - 20% off Jewelry Site-Wide