These are rings of 18 and 24 karat gold.
这些是18K和24K金的.
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This necklace of mine is not very expensive, it is 18 - karat gold.
我这个项链不太贵, 是18开金的.
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The brooch is cast in sterling silver and has 24 karat gold plated details.
该胸针是投在纯银,并已24克拉镀金的细节.
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