Jewelry should be stored away from natural sunlight and heat. We recommend place them in a protective (lined) jewelry box, a tarnish-resistant pouch or in a plastic zip lock bag made of polyethylene. Never use polyvinyl plastic bags. Do not store your jewelry in the bathroom or any humid spot. Please note that our SΦINX gift-boxes are not made for long-term storage as they are not airtight and tarnishing will occur over time.