Gold filled refers to a type of jewelry that is made by bonding a layer of gold to another metal, usually brass or silver、The gold layer is typically 5% of the total weight of the piece and is bonded using heat and pressure、Goldfilled jewelry is more durable than goldplated jewelry because the gold layer is thicker and less likely to wear off over time、It is also less expensive than solid gold jewelry, making it a popular choice for everyday wear.