These charms are:✨Lead and nickel free✨Hypoallergenic✨Tarnish ResistantGold filled is a type of jewelry that has a thick layer of gold bonded to a base metal, usually brass:✨CompositionGold filled with a brass base metal✨DurabilityGold filled jewelry is more durable than gold plated jewelry and doesn't tarnish easily.✨PriceGold filled is a more affordable alternative to solid gold.✨CareGold filled jewelry is easy to care for and is safe for sensitive skin.✨Gold filled is a higher quality "bridge" or "demi-fine" material than "costume" accessories made from plated base metals. However, it is typically not considered "fine jewelry" or in the same category as solid gold alloys and platinum metals.