Lucky Brand Silver and Turquoise Western Style Long Necklace/ Pendant

The bottom of this pendant hangs at around 15" from the clasp. The actual length of the chain alone stretched out straight is 28", and there is a @2" chain extension added to the clasp. It has the Lucky Brand shamrock and bead attached to the last link of the extension chain. The bottom of the chain has 6 1.25" silver bars where the pendant sits in between (3 on either side- see pics) and the pendant is about 2" long. The chain itself and all the findings are ALL magnetic (i.e. silver colored metal of some kind- probably stainless steel) and therefore probably contains nickel. (ALLERGIES!) The pendant and the four silver bars are NOT magnetic, but not sure what the metal makeup is there.