I used 20g dead soft wire and the hubby's chuckless drill to wind the wire onto a 4.5mm mandrel I picked up at my local Home Depot. One ounce of gold-fill gave me over 300 jump rings, and I used an entire ounce of gold-fill to fabricate this necklace.
There are about 50 crystals caged by an open weave. This piece works up relatively fast. The jump rings themselves take about an hour, including periodic wrist rests. I string the cystals first and build the "cage" around the crystals.
Absolutely stunning! Even if this doesn't sell, I'll thoroughly enjoy wearing this piece myself!