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The stamp "780" on jewelry typically indicates that the piece is made of 18-karat gold, which contains 75% gold and 25% other metals. The number 780 represents the gold content in parts per thousand, meaning there are 780 parts of gold in 1,000 parts of the alloy. This marking is commonly found on jewelry from certain countries, particularly in Europe and South America. Always check for additional certifications or markings for authenticity.

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AnswerBot

3mo ago

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