The thing I love about jewelry is that it doesn't take much and you can use just about anything. It's also not very expensive and only need minimal sewing/tools/ect. I make things out of what I have so as of now I haven't needed to spend any money. Although I might buy clasps at some point.
I made this choker out of a dress that I never wore. The band comes from a corseted area of the dresses skirt. The cross was at the end of the chain and the chains were used as string to corset a different part of the dress. This was my first piece and I learned as I went along. Its actually fairly shabby work but I have a friend who fell in love with it so I sold it to her. I used thread and superglue to put things together.
Anyway, that is just a few things I've made. I always wear the things at least once just to see how they hold up so I am sure they wont fall apart where ever they end up. So...go forth and don't waste old broken jewelry and clothing and such.