I am looking for hypoallergenic earring posts. My sister has had success with Rhodium plated and platinum plated earrings. Can you recommend anything for me?
You can try sterling silver earring posts. Many people with sensitive skin are able to wear sterling silver due to the high level of pure silver in the metal alloy; a combination of 92.5% by weight of silver and 7.5% by weight of other metals, usually copper.
Another hypoallergenic alternative is silver-plated stainless steel earring posts.
Anodized niobium earwires are also hypoallergenic, plus they come in several designer colors that you can match to your jewelry designs.