Gems, Jewelry, and Precious Metals
Showing 1929 products
![[Pre-owned] PT900 SAPPHIRE Ring S0.986ct D0.31ct 5.9g #14](http://koufuku.jp/cdn/shop/files/2000000090955_2.jpg?v=1763176059&width=480)
![[Pre-owned] PT900 Black Opal Ring, BO3.74ct D0.14ct, 7.4g, Size #17](http://koufuku.jp/cdn/shop/files/2000000016795_2.jpg?v=1763176059&width=480)
![[Pre-owned] K18WG Sapphire Ring S2.09ct D0.584ct 9.0g #18](http://koufuku.jp/cdn/shop/files/2000000037899_2.jpg?v=1763176059&width=480)
![[Pre-owned] PT950 BLACK OPAL Ring, BO4.35ct, D0.51ct, with Appraisal Certificate, 7.0g, Size 12](http://koufuku.jp/cdn/shop/files/2000000013152_2.jpg?v=1763176059&width=480)
![[Pre-owned] PT950 Black Opal Ring BO4.57ct D2.74ct 9.5g #11.5](http://koufuku.jp/cdn/shop/files/2000000031125_2.jpg?v=1763176059&width=480)
![[Pre-owned] K18/PT900/Enamel Emerald & Diamond Pendant Necklace E0.78ct D1.35ct D0.14ct 17.5g](http://koufuku.jp/cdn/shop/files/2000000018003_3.jpg?v=1763176166&width=480)
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![[Used] K18WG NO HEAT RUBY RING Non-heated Ruby Ring R1.04ct D0.50ct AIGS Pigeon Blood Certificate 3.3g #13.5](http://koufuku.jp/cdn/shop/files/2000000036090_4.jpg?v=1764830276&width=480)
![[Pre-owned] K18YG TOURMALINE Necklace 12.1g](http://koufuku.jp/cdn/shop/files/2000000111889_2.jpg?v=1764830276&width=480)
![[Pre-owned] K18YG Ruby Ring R0.65ct D0.33ct 7.8g #12](http://koufuku.jp/cdn/shop/files/2000000044439_2.jpg?v=1764830276&width=480)
![[Used] K18WG NO HEAT RUBY RING AIGS Pigeon Blood Certificate 1.03ct D0.29ct 1.9g #14](http://koufuku.jp/cdn/shop/files/2000000047867_4.jpg?v=1764830276&width=480)
![[Pre-owned] K18YG Ruby Ring R2.10ct D1.00ct 9.5g #12](http://koufuku.jp/cdn/shop/files/DSC_3928.jpg?v=1769670706&width=480)
![[Pre-owned] K18WG Ruby Ring R0.99ct D0.70ct, with AIGS Unheated Certificate, 2.8g, Size 13.5](http://koufuku.jp/cdn/shop/files/2000000047881_4.jpg?v=1764830276&width=480)
![[Pre-owned] WALTHAM Necklace K18YG DIAMOND Pendant Necklace 25.6g ONE PRICE](http://koufuku.jp/cdn/shop/files/2000000114354_2.jpg?v=1764830277&width=480)
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![[Pre-owned] K18WG Heated Ruby Ring, Ruby 1.04ct, Diamond 0.22ct, with AIGS Pigeon Blood Certificate, 3.1g, Size 13.5](http://koufuku.jp/cdn/shop/files/2000000036564_3.jpg?v=1764830276&width=480)
![[Pre-owned] K18YG South Sea Baroque Pearl Pendant Necklace 11.8mm 5.0g](http://koufuku.jp/cdn/shop/files/2000000099231_2.jpg?v=1764830276&width=480)
![[Pre-owned] K18/K18WG Diamond Pendant Necklace D1.37ct 4.5g](http://koufuku.jp/cdn/shop/files/2000000113029_2.jpg?v=1764830276&width=480)
![[Pre-owned] K18WG Heated Ruby Ring R1.12ct D0.75ct with AIGS Pigeon Blood Certificate, 4.1g #13](http://koufuku.jp/cdn/shop/files/2000000036694_3.jpg?v=1764830277&width=480)
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![[Used] K18WG RUBY RING Ruby ring R0.54ct D0.03ct 3.0g #15.5](http://koufuku.jp/cdn/shop/files/2000000044361_2.jpg?v=1764830277&width=480)
![[Pre-owned] K18WG Mozambican Unheated Ruby Ring 2.00ct D0.47ct, with GRS Certificate, 3.9g, Size 14](http://koufuku.jp/cdn/shop/files/2000000094762_3.jpg?v=1764830276&width=480)
![[Pre-owned] K18WG Mozambique Unheated Ruby Ring R2.02ct D0.64ct with GRS Certificate 5.1g Size 14](http://koufuku.jp/cdn/shop/files/2000000071497_3.jpg?v=1764830276&width=480)
![[Pre-owned] K18WG Unheated Ruby Ring R1.27ct D0.36ct with AIGS Pigeon Blood Certificate, 2.9g, Size 12](http://koufuku.jp/cdn/shop/files/2000000035949_4.jpg?v=1764830277&width=480)
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KOUFUKU is an e-commerce site that offers a wide range of products, including jewelry, precious metals, designer bags, designer watches, designer apparel, and tableware. In addition to retail sales, we also provide purchase services.
![[Pre-owned] MITSUKOSHI K18YG Ruby & Diamond Ring R0.79ct D0.82ct 7.8g #12.5](http://koufuku.jp/cdn/shop/files/2000000145907_2.jpg?v=1788151913&width=480)
![[Used] PT900 NO HEAT SAPPHIRE RING Sri Lankan Unheated Sapphire Ring S5.40ct D1.19ct GIA Certificate 10.4g #11.5](http://koufuku.jp/cdn/shop/files/2000000133799_3.jpg?v=1777881348&width=480)
![Used] K18YG ENAMEL PENDANT NECKLACE 13.4g](http://koufuku.jp/cdn/shop/files/2000000134116_2.jpg?v=1778489330&width=480)