I have a little sign that says "free gift wrapping available" with a sample package in front of it, and I tend to point out to people that my jewelry makes good gifts. Most of my jewelry, however, is in the less than $20 price range.
Personally, I don't spend more than $30 on anyone's gifts except my kids' and I would never spend that much on jewelry for my daughter. I would be more likely to spend it on a gift card and let her spend it on jewelry if that's what she really wanted. She tends to remember the value of things when she has to spend the actual $ amount on the item, rather than getting it as just another present for Christmas or her birthday.
The people that do spend more money on my jewelry for gifts are husbands who forgot a birthday or Valentine's day, or my dad whose wife is addicted to jewelry and favorites all my new stuff so he can know what to get.