Showing 184 products
![[Pre-owned] PT900 DIAMOND RING 1.002ct I-Color SI2-Clarity D1.005ct CGL Certified 12.1g #12](http://koufuku.jp/cdn/shop/files/2000000123424_4.jpg?v=1768882395&width=480)
![[Pre-owned] K18WG ALEXANDRITE RING A2.67ct D1.94ct GRS Certified, 18.0g, Size 11](http://koufuku.jp/cdn/shop/files/2000000078502_3.jpg?v=1768806609&width=480)
![[Used] PT900 DIAMOND RING Diamond Ring 0.330ct D0.55ct 2.3g #8](http://koufuku.jp/cdn/shop/files/2000000121956_2.jpg?v=1768806607&width=480)
![[Pre-owned] PT900 BLACK OPAL RING BO3.48ct D2.00ct with GRJ Sorting, 11.8g, Size 12](http://koufuku.jp/cdn/shop/files/DSC_6311.jpg?v=1771668261&width=480)
![[Pre-owned] PT900/K18YG RUBY RING R1.16ct D1.64ct 8.0g #8](http://koufuku.jp/cdn/shop/files/2000000043456_2.jpg?v=1768444828&width=480)
![[Pre-owned] K18WG NO HEAT RUBY RING Mozambique Untreated Ruby Ring R3.03ct D1.33ct GRS Certified 8.0g #13.5](http://koufuku.jp/cdn/shop/files/2000000069395_4.jpg?v=1768444693&width=480)
![[Pre-owned] K18YG MEXICO OPAL Fire Opal Ring OP2.44ct D0.38ct with Appraisal, 11g, Size #12](http://koufuku.jp/cdn/shop/files/2000000064031_3.jpg?v=1768444693&width=480)
![[Pre-owned] K18WG/YG NO HEAT RUBY RING Mozambique Origin Unheated Ruby Ring R3.03ct D1.20ct AIGS Pigeon Blood Gemological Report 8.0g #14.5](http://koufuku.jp/cdn/shop/files/2000000071800_4.jpg?v=1768444692&width=480)
![[Pre-owned] K18WG Sri Lankan Unheated Sapphire Ring S4.26ct D0.37ct with AIGS Report, 4.4g, Size 13.5](http://koufuku.jp/cdn/shop/files/2000000038810_3.jpg?v=1768197670&width=480)
![[Pre-owned] PT950 SAPPHIRE RING, Sri Lankan Unheated Sapphire Ring, S4.25ct D1.63ct, GIA Report included, 6.0g, Size 11.5](http://koufuku.jp/cdn/shop/files/2000000000749_4.jpg?v=1768197670&width=480)
![[Pre-owned] MONNICKENDAM Ring K18YG DIAMOND 0.82ct 5.8g ONE PRICE #17](http://koufuku.jp/cdn/shop/files/2000000009346_2.jpg?v=1768185890&width=480)
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![[Pre-owned] GUCCI SV Interlocking G Ring 6.9g #12.5 ONE PRICE](http://koufuku.jp/cdn/shop/files/2000000122021_2.jpg?v=1768185641&width=480)
![[Pre-owned] K18YG SAPPHIRE RING Sapphire 0.906ct Diamond 0.36ct 7.0g #12](http://koufuku.jp/cdn/shop/files/2000000117225_2.jpg?v=1768185637&width=480)
![[Pre-owned] K18YG Ruby Ring R0.62ct D0.15ct 7.7g #21](http://koufuku.jp/cdn/shop/files/2000000124698_2.jpg?v=1767585969&width=480)
![[Pre-owned] PT900 JADEITE Ring, D0.72ct, with CGL Sorting, 8.3g, Size 11](http://koufuku.jp/cdn/shop/files/2000000126180_3.jpg?v=1767585969&width=480)
![[Pre-owned] K18 Ruby Ring R1.18ct D0.48ct CGL Sorting 7.6g #17](http://koufuku.jp/cdn/shop/files/2000000126036_3.jpg?v=1767585974&width=480)
![[Pre-owned] MIKIMOTO PT900 Tahiti Pearl Ring P10.5mm 8.0g #6 ONE PRICE](http://koufuku.jp/cdn/shop/files/2000000015538_2.jpg?v=1768096999&width=480)
![[Pre-owned] K18YG Emerald & Ruby Ring E0.45ct R0.42ct 6.3g #10](http://koufuku.jp/cdn/shop/files/2000000070568_2.jpg?v=1767585888&width=480)
![[Used] PT900 EMERALD RING Colombian Vivid Green Emerald Ring E2.61ct D1.13ct GRS Certificate #12 8.0g](http://koufuku.jp/cdn/shop/files/2000000035673_4.jpg?v=1753249894&width=480)
![[Pre-owned] K18YG EMERALD DIAMOND Pendant Necklace 7.9g](http://koufuku.jp/cdn/shop/files/2000000115320_3.jpg?v=1766992797&width=480)
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] K18YG Rutile Quartz Cat's Eye Necklace QZ6.02ct D0.02ct 13.2g](http://koufuku.jp/cdn/shop/files/2000000115290_2.jpg?v=1766992797&width=480)
![[Pre-owned] PT900 EMERALD RING E0.90ct D0.46ct 6.2g #13](http://koufuku.jp/cdn/shop/files/2000000125671_2.jpg?v=1766992784&width=480)
![[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)