are there any??
for jewelery?
For me any spellwork is intensely personal, as in you can't exchange them with others, a.k.a direct magic. The MOST important part of any spell you want to put on that jewelry is a)intention(s) and then b)the gathering and focussing of energy.
Break down your intentions into simple instructions (a bit like programming LOL). It's better to keep things very simple to start with. Work with one intention ideally especially as a beginner (which I am of course!).
I speak in "tongues" or something so I don't need english rhymes and similar, however it's normal for me to do so. You are probably different so you'll need to create a very clear spell that you feel reflects exactly what you need-this is going to be like poetry.
http://www.angelfire.com/mi3/tomekeeper/index.html
This guy covers the ground well on direct magic and there is a section on enchantment.
The next thing you will need is to raise energy and focus it. That site should help you better than I can, I'm too used to using this for healing these days, so my explanations aren't likely to be useful to you.
Of course you might feel that "trade a spell" can work for you (getting premade spells). Maybe that can :-), if you've got the concentration etc..