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Gold filled and gold plated are both terms used to describe jewelry that has a layer of gold on its surface. However, there are significant differences between the two in terms of composition, durability, and longevity.

Gold filled jewelry is made by bonding a thick layer of solid gold to a base metal (usually brass or copper) using heat and pressure. The gold layer in gold filled jewelry must be at least 5% of the total weight of the item. This process creates a durable and long-lasting piece of jewelry that will not easily tarnish, fade, or wear off. Gold filled jewelry often contains a higher amount of gold than gold plated jewelry, making it more valuable and resistant to wear over time.

On the other hand, gold plated jewelry is made by applying a thin layer of gold onto a base metal through a process called electroplating. The gold layer in gold plated jewelry is generally much thinner than in gold filled jewelry. Over time, the gold plating on gold plated jewelry can wear off, exposing the base metal underneath and resulting in a loss of the gold color and shine. Gold plated jewelry is generally more affordable than gold filled jewelry but may require more frequent re-plating to maintain its appearance.

In summary, gold filled jewelry offers a thicker layer of gold bonded to a base metal, providing greater durability and longevity compared to gold plated jewelry. While gold filled jewelry may be initially more expensive, it offers a higher quality and longer-lasting option, making it a popular choice for those seeking lasting gold jewelry.