[KongchangAI]
Unverified85% confidenceCautionTime unknown

投资保值不建议买品牌镶嵌成品钻戒,品牌溢价和工费占比高(可达50%以上)转手贬值大;纯投资应买裸钻+GIA证书或标准金条,成品的收藏价值主要在品牌与设计而非材料本身

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85%
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Long-term
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https://kongchang.com/claim/135957
API
curl https://kongchang.com/api/v1/knowledge/claims/135957
MCP
get_claim(id=135957)