Showing 1787 products
![[Pre-owned] K18YG Mozambique Ruby Ring R2.60ct D0.42ct with GIA certificate, 5.2g, size 11](http://koufuku.jp/cdn/shop/files/2000000039862_3.jpg?v=1759988719&width=480)
![[Pre-owned] K18YG Ruby Ring R0.40ct D0.28ct, includes appraisal report, 5.3g, size 10](http://koufuku.jp/cdn/shop/files/2000000052625_2.jpg?v=1759990523&width=480)
![[Pre-owned] K18YG Ruby Ring R1.63ct D0.32ct 5.5g #13.5](http://koufuku.jp/cdn/shop/files/2000000041063_2.jpg?v=1762391161&width=480)
![[Pre-owned] K18YG Ruby/Diamond Pendant Necklace R0.21ct D0.81ct 7.2g](http://koufuku.jp/cdn/shop/files/2000000058283_2.jpg?v=1764830345&width=480)
![[Pre-owned] K18YG Ruby Ring R0.61ct D0.38ct 6.3g #8](http://koufuku.jp/cdn/shop/files/2000000052793_2.jpg?v=1764915892&width=480)
![[Pre-owned] K18YG Ruby Ring D1.20ct 6.4g #11.5](http://koufuku.jp/cdn/shop/files/DSC_2026.jpg?v=1761632726&width=480)
![[Pre-owned] K18YG Ruby Ring R0.25ct D0.07ct 2.2g #8.5](http://koufuku.jp/cdn/shop/files/2000000086033_2.jpg?v=1752392450&width=480)
![[Pre-owned] K18YG Ruby Ring R0.27ct D0.08ct 2.4g #8](http://koufuku.jp/cdn/shop/files/2000000105581_2.jpg?v=1762391160&width=480)
![[Pre-owned] K18YG Ruby Ring R0.44ct D0.11ct 4.4g #11](http://koufuku.jp/cdn/shop/files/2000000009667_2.jpg?v=1759988719&width=480)
![[Pre-owned] K18YG Ruby Ring R0.56ct D1.00ct 6.4g #10.5](http://koufuku.jp/cdn/shop/files/DSC_2022.jpg?v=1761632678&width=480)
![[Pre-owned] K18YG Ruby Ring R0.58ct D0.62ct 7.0g #12.5](http://koufuku.jp/cdn/shop/files/2000000087900_2.jpg?v=1759988719&width=480)
![[Pre-owned] K18YG Ruby Ring R0.62ct D0.05ct 2.0g #6.5](http://koufuku.jp/cdn/shop/files/2000000105598_2.jpg?v=1762391161&width=480)
![[Pre-owned] K18YG Ruby Ring R0.65ct D0.80ct 7.5g #10](http://koufuku.jp/cdn/shop/files/2000000117508_2.jpg?v=1764915892&width=480)
![[Pre-owned] K18YG Ruby Ring R0.68ct D0.37ct 7.4g #12](http://koufuku.jp/cdn/shop/files/2000000108919_2.jpg?v=1762397786&width=480)
![[Pre-owned] K18YG Ruby Ring, R0.69ct, D0.45ct, with NGL Appraisal Report, 6.0g, Size 16](http://koufuku.jp/cdn/shop/files/2000000115207_3.jpg?v=1762391161&width=480)
![[Pre-owned] K18YG Ruby Ring R0.69ct D0.73ct 6.5g #11](http://koufuku.jp/cdn/shop/files/2000000052540_2.jpg?v=1759988719&width=480)
![[Pre-owned] K18YG Ruby Ring R0.79ct D1.27ct 9.2g #14](http://koufuku.jp/cdn/shop/files/2000000002330_2.jpg?v=1759988719&width=480)
![[Pre-owned] K18YG Ruby Ring R0.85ct D0.065ct with NGL Appraisal, 4.9g, Size 8.5](http://koufuku.jp/cdn/shop/files/2000000038926_3.jpg?v=1759988719&width=480)
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![[Pre-owned] K18YG Ruby Ring R0.90ct D1.40ct 4.8g #12.5](http://koufuku.jp/cdn/shop/files/2000000044606_2.jpg?v=1767585888&width=480)
![[Pre-owned] K18YG Ruby Ring R0.91ct D1.22ct 8.1g #11](http://koufuku.jp/cdn/shop/files/2000000068671_2.jpg?v=1759988719&width=480)
![[Pre-owned] K18YG Ruby Ring R0.92ct D1.45ct 8.3g #16](http://koufuku.jp/cdn/shop/files/DSC_2031.jpg?v=1761632769&width=480)
![[Pre-owned] K18YG Ruby Ring R0.96ct D0.70ct 6.7g #12](http://koufuku.jp/cdn/shop/files/2000000040110_2.jpg?v=1764915891&width=480)
![[Pre-owned] K18YG Ruby Ring R1.01ct D0.63ct 5.8g #12](http://koufuku.jp/cdn/shop/files/2000000037660_2.jpg?v=1765012877&width=480)
![[Pre-owned] K18YG Ruby Ring R1.43ct D0.75ct 7.4g #11.5](http://koufuku.jp/cdn/shop/files/2000000010946_2.jpg?v=1762391162&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] 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)