Answer:
Yes Barb, to make the trillion stones you mention into rings, I would use the prong ring method, making one prong on each end a bit longer (using the formulation in the DVD). As they are 12mm on each side, I would use 22-gauge wire, because when it is folded in half the prongs will not cover too much of the stone. The prongs on the widest point could be made as long as 3mm, while the ones that will go on the more narrow point I would make 2mm long.
Answer contributed by Dale "Cougar" Armstrong