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![[Pre-owned] PT900 Jadeite Ring J1.96ct D0.43ct CGL Sorting #12.5 7.9g](http://koufuku.jp/cdn/shop/files/2000000035680_3.jpg?v=1753249893&width=480)
![[Pre-owned] PT900 South Sea White Pearl Ring 11.3mm D0.10ct #12 5.0g](http://koufuku.jp/cdn/shop/files/2000000049830_3.jpg?v=1753249893&width=480)
![[Pre-owned] PT900 Jadeite Ring J4.01ct D1.20ct #12 12.8g](http://koufuku.jp/cdn/shop/files/2000000035710_3.jpg?v=1753249893&width=480)
![[Pre-owned] PT900/K18YG Thailand Ruby Ring, R2.96ct, with DGRS/GIA Report, 7.7g](http://koufuku.jp/cdn/shop/files/2000000035765_6.jpg?v=1753249893&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] PONTE VECCHIO K18YG PEARL Ring 7.9mm D0.26ct 7.0g #11 ONE PRICE](http://koufuku.jp/cdn/shop/files/2000000002422_2.jpg?v=1752397216&width=480)
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![[Pre-owned] K18WG SAPPHIRE Sapphire Ring S0.82ct D0.24ct 3.3g #13](http://koufuku.jp/cdn/shop/files/2000000036304_2.jpg?v=1752392598&width=480)
![[Pre-owned] K18YG Diamond Ring D1.13ct 4.3g #12.5](http://koufuku.jp/cdn/shop/files/2000000039596_2.jpg?v=1752392593&width=480)
![[Pre-owned] K18YG Emerald Ring E0.92ct with CGL Report 9.4g #10](http://koufuku.jp/cdn/shop/files/2000000071442_3.jpg?v=1752392578&width=480)
![[Pre-owned] K18YG Diamond Ring D1.26ct 9.7g #13.5](http://koufuku.jp/cdn/shop/files/2000000025438_2.jpg?v=1752392578&width=480)
![[Used] PT900 NO-HEAT PAPARACIA SAPPHIRE RING, Unheated Padparadscha Sapphire Ring, PS1.40ct D0.516ct, GRS Certificate, 5.9g, #11](http://koufuku.jp/cdn/shop/files/2000000071343_3.jpg?v=1752392572&width=480)
![[Pre-owned] K18WG Emerald Ring E2.11ct D0.52ct 4.7g #13](http://koufuku.jp/cdn/shop/files/2000000041865_2.jpg?v=1752392570&width=480)
![[Pre-owned] K18WG/Black Plated GOLDEN PEARL Ring P11.7mm D2.68ct 17.4g #12.5](http://koufuku.jp/cdn/shop/files/2000000042398_2.jpg?v=1752392569&width=480)
![[Pre-owned] K18WG Black Opal Ring BO1.22ct D0.11ct 3.3g #13.5](http://koufuku.jp/cdn/shop/files/2000000036632_2.jpg?v=1752392568&width=480)
![[Pre-owned] K18WG Black Opal Ring, BO 2.29ct, D 0.13ct, 3.4g, Size 13.5](http://koufuku.jp/cdn/shop/files/2000000036830_2.jpg?v=1752392569&width=480)
![[Pre-owned] K18WG Sapphire Ring S0.93ct D0.17ct 2.2g #11.5](http://koufuku.jp/cdn/shop/files/2000000036618_2.jpg?v=1752392569&width=480)
![[Pre-owned] K18YG Ruby Ring R1.699ct D0.67ct 8.3g #9.5](http://koufuku.jp/cdn/shop/files/2000000044569_2.jpg?v=1752392569&width=480)
![[Pre-owned] K18WG Madagascar Sapphire Ring 3.13ct D0.25ct with GRS Certificate, 4.4g, Size 12.5](http://koufuku.jp/cdn/shop/files/2000000042282_3.jpg?v=1752392568&width=480)
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![[Pre-owned] K18WG JADEITE Ring J4.04ct D0.57ct 5.4g #13](http://koufuku.jp/cdn/shop/files/2000000040745_2.jpg?v=1752392568&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 Demantoid Garnet Ring, G0.69ct, D0.70ct, with NGL Appraisal, 6.4g, Size 11.5](http://koufuku.jp/cdn/shop/files/2000000071909_3.jpg?v=1752392550&width=480)
![[Pre-owned] PT900 STAR SAPPHIRE Ring SS7.72ct D0.09ct 6.8g #10.5](http://koufuku.jp/cdn/shop/files/2000000068503_2.jpg?v=1752392549&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)