Showing 139 products
![[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)
![[Used] PT1000/PT900 BLACK OPAL NECKLACE Black Opal Pendant Necklace BO7.57ct D1.34ct 10.7g](http://koufuku.jp/cdn/shop/files/2000000112718_2.jpg?v=1771816794&width=480)
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![[Pre-owned] K18YG GOLDEN PEARL RING P11.3mm D0.44ct 10.5g #13](http://koufuku.jp/cdn/shop/files/2000000130217_2.jpg?v=1771658187&width=480)
![[Pre-owned] K18 PHOENIX PEARL PENDANT NECKLACE, White South Sea Pearl Pendant Necklace, P11.4mm, D2.08ct, 24.2g, with Pearl Science Laboratory (PSL) sorting.](http://koufuku.jp/cdn/shop/files/2000000027579_3.jpg?v=1771658188&width=480)
![[Pre-owned] PT900 SAPPHIRE RING S2.57ct D1.51ct 14.3g #15](http://koufuku.jp/cdn/shop/files/2000000071954_2.jpg?v=1768882396&width=480)
![Used] MIKIMOTO PT950 ALEXANDRITE RING A0.42ct D0.62ct 6.1g #15 ONE PRICE](http://koufuku.jp/cdn/shop/files/2000000123844_3.jpg?v=1768882396&width=480)
![[Pre-owned] K18WG Ruby Ring R0.21ct PS0.09ct D0.07ct w/ Guarantee & Sorting Report, 3.3g, Size 13](http://koufuku.jp/cdn/shop/files/2000000075112_3.jpg?v=1768808641&width=480)
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![[Pre-owned] PT950 NO HEAT SAPPHIRE RING, 2.45ct Sapphire, 0.70ct Diamond, GRS Certified, 8.9g, Size 13](http://koufuku.jp/cdn/shop/files/2000000082615_4.jpg?v=1768808621&width=480)
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![[Pre-owned] K18YG AKOYA PEARL RING, P6.4-8.4mm, D0.60ct, 25.2g](http://koufuku.jp/cdn/shop/files/2000000127293_2.jpg?v=1768808620&width=480)
![[Pre-owned] K18YG Pearl Ring, 9.2mm Pearl, 1.13ct Diamond, 10.8g, Size 16](http://koufuku.jp/cdn/shop/files/2000000031095_2.jpg?v=1768806608&width=480)
![[Pre-owned] K18WG STAR SAPPHIRE RING Star Sapphire 4.90ct Diamond 0.55ct 5.8g #14](http://koufuku.jp/cdn/shop/files/2000000039565_2.jpg?v=1768800609&width=480)
![[Pre-owned] K18WG Boulder Opal Ring OP4.09ct D0.51ct 6.7g #13](http://koufuku.jp/cdn/shop/files/2000000070650_2.jpg?v=1768800609&width=480)
![[Pre-owned] K18WG BLACK OPAL RING BO1.40ct D0.63ct 3.2g #12.5](http://koufuku.jp/cdn/shop/files/2000000042121_2.jpg?v=1768800610&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.
![[Used] K18YG LAZURITE Lapis Lazuli Ring Concrete Design 13.2g #13](http://koufuku.jp/cdn/shop/files/2000000087597_2.jpg?v=1778134492&width=480)
![[Pre-owned] K18WG Myanmar Ruby Ring, R1.31ct D0.67ct, AIGS Pigeon Blood, with certificate, 5.8g, size 13](http://koufuku.jp/cdn/shop/files/2000000091433_4.jpg?v=1768446384&width=480)
![[Pre-owned] K18WG Boulder Opal, Pink Sapphire Ring O13.42ct PS0.86ct D0.27ct 10.0g #15](http://koufuku.jp/cdn/shop/files/2000000092607_2.jpg?v=1768446384&width=480)
![[Pre-owned] K18WG Sapphire Ring, Sri Lankan Sapphire 4.08ct, Diamond 0.96ct, with GRS Certificate, 7.2g, Size 14](http://koufuku.jp/cdn/shop/files/2000000048406_3.jpg?v=1768444692&width=480)
![[Pre-owned] MIKIMOTO K18YG AKOYA PEARL Pendant Necklace P5.0-7.5mm D 8.0g ONE PRICE](http://koufuku.jp/cdn/shop/files/2000000023397_2.jpg?v=1768197670&width=480)