The "290" marking on jewelry typically indicates the metal's purity, specifically referring to a 29% gold content, which translates to 7 karats. This marking is less common than higher karat golds, such as 10K or 14K, which contain more gold. It's important to verify the context of the marking, as it can also be part of a manufacturer's code or a specific design series. Always consult with a jeweler for accurate identification.
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The number 238 on jewelry typically refers to the purity of gold. It indicates that the gold is 23.8 karats, meaning it contains 99.92% pure gold, which is very high quality. This marking is often used in countries that follow the metric system for gold purity, and it signifies a premium level of craftsmanship and material.
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70%*290 = 70/100 * 290 = 7/10 * 290 = (7*290)/10 = 2030/10 = 203
10% of 290 = 0.10 x 290= 29
360-290 = 70