I'm so glad you asked this question! Your allergy is not rare by any means. My own, dear, mother was allergic to precious metals. She could wear 18kt white gold and that was it. I don't know if she ever tried platinium. My sister-in-law is allergic to precious metals as well. She wears surgical steel and any pearls I knot for her
. Titanium is a good choice, but surgical and stainless steel are also options.