Showing 1288 products
![[Pre-owned] 18K Yellow Gold Ruby Ring, R 0.43ct, D 0.18ct, 5.1g, #12](http://koufuku.jp/cdn/shop/files/2000000112503_2.jpg?v=1762391139&width=480)
![[Pre-owned] 18K Yellow Gold Ruby Ring, R 0.43ct, D 0.40ct, 4.5g, #10](http://koufuku.jp/cdn/shop/files/2000000098180_2.jpg?v=1760667249&width=480)
![[Pre-owned] 18K Yellow Gold Ruby Ring, 0.47ct, Diamonds, 5.6g, #13.5](http://koufuku.jp/cdn/shop/files/2000000042527_2.jpg?v=1751698229&width=480)
![[Used] K18YG RUBY Ruby Ring R0.50ct D0.22ct 3.7g #10.5](http://koufuku.jp/cdn/shop/files/2000000085166_2.jpg?v=1746252612&width=480)
![[Pre-owned] 18K Yellow Gold Ruby Ring, R0.59ct, D1.00ct, 6.9g, #12](http://koufuku.jp/cdn/shop/files/2000000044378_2.jpg?v=1750401687&width=480)
![[Pre-owned] 18K Yellow Gold Ruby Ring, R 0.68ct, D 0.28ct, 5.7g, #9.5](http://koufuku.jp/cdn/shop/files/2000000105574_2.jpg?v=1764915892&width=480)
![[Pre-owned] 18K Yellow Gold Ruby Ring, R 0.70ct, D 0.56ct, 4.7g, #11](http://koufuku.jp/cdn/shop/files/2000000043562_2.jpg?v=1751698229&width=480)
![[Pre-owned] 18K Yellow Gold Ruby Ring, R1.01ct, D2.00ct, 6.5g, #10.5](http://koufuku.jp/cdn/shop/files/DSC_2008.jpg?v=1761632400&width=480)
![[Used] K18YG RUBY Ruby Ring R1.18ct D0.27ct 3.8g #5](http://koufuku.jp/cdn/shop/files/2000000043586_2.jpg?v=1746249845&width=480)
![[Used] K18YG RUBY Ruby Ring R1.30ct D0.90ct 7.0g #8](http://koufuku.jp/cdn/shop/files/2000000037875_2.jpg?v=1746252009&width=480)
![[Used] K18YG RUBY Ruby Ring R1.39ct D0.50ct 5.6g #11](http://koufuku.jp/cdn/shop/files/2000000077437_2.jpg?v=1746252099&width=480)
![[Used] K18YG RUBY Ruby Ring R1.81ct D1.40ct GRJ Sorting 15.1g #13](http://koufuku.jp/cdn/shop/files/2000000069715_8.jpg?v=1745911847&width=480)
![[Used] K18YG RUBY Ruby Ring R2.52ct D0.39ct 7.4g #13](http://koufuku.jp/cdn/shop/files/2000000071435_8.jpg?v=1749695656&width=480)
![[Pre-owned] 18K Yellow Gold Ruby Ring, R7.29ct, D2.17ct, Grade #8, 8.7g](http://koufuku.jp/cdn/shop/files/2000000035734_3.jpg?v=1753249893&width=480)
![[Pre-owned] 18K Yellow Gold Ruby Ring, R 0.354ct, D 1.08ct, 5.0g, #10](http://koufuku.jp/cdn/shop/files/2000000121871_2.jpg?v=1768197670&width=480)
![[Pre-owned] 18K Yellow Gold Ruby Ring, R 0.62ct, D 0.15ct, 7.7g, #21](http://koufuku.jp/cdn/shop/files/2000000124698_2.jpg?v=1767585969&width=480)
![[Used] 18K Yellow Gold Ruby Ring, 1.79ct R, 0.48ct D, 5.2g #16](http://koufuku.jp/cdn/shop/files/DSC_2035_f0d9386a-7356-4886-a585-bae73d041c1d.jpg?v=1761633128&width=480)
![[Pre-owned] 18K Yellow Gold Ruby & Diamond Ring, R2.16ct, D2.29ct, 20.7g, #20](http://koufuku.jp/cdn/shop/files/2000000105550_2.jpg?v=1768808641&width=480)
Sold Out
![[Pre-owned] 18K Yellow Gold Ruby & Diamond Ring, R0.16ct, D0.50ct, 6.1g, #9](http://koufuku.jp/cdn/shop/files/2000000047072_2.jpg?v=1760667250&width=480)
![[Pre-owned] K18YG RUBYRING Ruby Ring R1.42ct D0.08ct 3.7g #11](http://koufuku.jp/cdn/shop/files/2000000115504_2.jpg?v=1768808621&width=480)
KOUFUKU is an e-commerce site that handles a wide range of products, from jewelry and precious metals to brand bags, brand watches, brand apparel, and tableware. In addition to sales, we also offer a purchase service.
![[Pre-owned] 18K Yellow Gold Ruby Ring, R1.63ct, D0.32ct, 5.5g, #13.5](http://koufuku.jp/cdn/shop/files/2000000041063_2.jpg?v=1762391161&width=480)
![[Used] PT900 SAPPHIRE RING Sapphire Ring S2.57ct D1.51ct 14.3g #15](http://koufuku.jp/cdn/shop/files/2000000071954_2.jpg?v=1768882396&width=480)
![[Pre-owned] MIKIMOTO PT950 ALEXANDRITE RING, A 0.42ct, D 0.62ct, 6.1g, #15, ONE PRICE](http://koufuku.jp/cdn/shop/files/2000000123844_3.jpg?v=1768882396&width=480)
