I got 25’ of 16 gage wire from a home improvement store for less than $2.00. You could also use a coat hanger.
Step 1: Make rings
Step 2: Start weaving
Open a fourth ring and run it through the three others. Lay it flat and push it together.
Repeat the process until you have the desired amount of rings. I used 7.
Step 3: Arrange and solder
Solder the rings and wait for it to cool before handling.
For more info on soldering, flux and so on check out http://www.instructables.com/id/Phillips-Head-Stud-Earrings/
Step 4: Jump ring and polish
Make a jump ring using the same socket and pliers method. File the edges so that it closes nicely and attaché it through the pendant.