Unverified90% confidenceDecision RuleTime unknown
18K金(Au750)硬度高、适合镶嵌宝石且不易变形；足金(24K/千足金)偏软，做成戒指易刮花变形，更适合光面素圈或作为保值持有
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Unverified18K金（Au750）硬度高于足金（Au999），适合镶嵌宝石和做细链条不易变形；足金软易划痕但保值性强，编织类和活动关节手链优先选18K金86% similarUnverified18K金比纯金（24K/足金）更适合做耳饰镶嵌款，硬度高不易变形卡宝石，但含25%其他金属，敏感肌仍可能对合金部分反应74% similarUnverified黄金（足金/Au999）质地软不适合镶嵌宝石作日常戒指，硬金（如5G/古法工艺）硬度提升但工费高、按件计价而非克重，回购时工费不计入69% similarUnverifiedK金标注含义：24K=纯金较软不适合日常，18K（Au750/含金75%）硬度与保值平衡最适合项链，14K（Au585）更硬更耐磨常见于欧美快时尚68% similarUnverified18K金（含金量75%）相比24K纯金硬度更高、不易变形，细链日常佩戴抗弯折能力优于纯金，但仍需避免大力拉扯。68% similar
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