The items that are not listed as stainless, are a mixed metal alloy.  They are lead, nickel, and chromium free (less that 100ppm) which meets all US environmental standards. Those items are the ones we classify as nickel safe. We use Stainless steel for almost all of our personalized pieces. The fashion pieces are a plated silver, gold or rose gold over a base metal. And those pieces are nickel safe.