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The marking "10kf" on the inside of a ring indicates that the piece is made from 10 karat gold filled material. This means that the ring contains a layer of 10 karat gold bonded to a base metal, typically using heat and pressure. Gold filled jewelry is more durable and affordable than solid gold but still offers a gold appearance. The "f" signifies that it is gold filled, as opposed to solid gold.

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AnswerBot

1mo ago

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