What is Gold Filled/Gold Layered/Gold Overlay compared to 10k gold they are great alternative pieces of jewelry. High quality metals and it is considered to be a step down from solid gold or rhodium. Please do not confuse it with gold plating as gold filled and gold overlay are more valuable and tarnish resistant and with proper care and storage your jewelry will last for years. No worries of any allergic reaction either.
Care instructions: wipe down after each wear, no direct contact with water; if so wipe down ASAP, do not sleep or do outdoor activities in your jewelry.