chanel costume jewelry questions!!

  1. Hey everyone! I adore Chanel costume jewelry but i was wondering if anyone has had an allergic reaction to it? I recently discovered im allergic to silver (earrings only) and im curious as to whether i will react to Chanel (i know the costume jewelry isnt silver.) As well, why do only certain Chanel boutiques sell sterling silver jewelry?
  2. I only wear Chanel pearls, have two different style strands. I don't know anything about the other costume jewelry from Chanel. I do know that the gold links on one pair of my pearls is plated alloy. Does Chanel do costume jewelry in sterling silver?