Showing 1787 products
![[Pre-owned] K18WG DIAMOND Necklace D5.10ct 33.4g](http://koufuku.jp/cdn/shop/files/2000000003962_2.jpg?v=1765163849&width=480)
![[Pre-owned] K18WG Diamond Bracelet D0.92ct 11.5g 18cm](http://koufuku.jp/cdn/shop/files/2000000030197_2.jpg?v=1762316313&width=480)
![[Pre-owned] K18WG Diamond Bracelet, D2.00ct, with sorting card, 10.6g, 18cm](http://koufuku.jp/cdn/shop/files/2000000030319_4.jpg?v=1769655134&width=480)
![[Pre-owned] K18WG Diamond Ring 0.50ct 3.3g #11.5](http://koufuku.jp/cdn/shop/files/2000000075334_3.jpg?v=1750923953&width=480)
![[Pre-owned] K18WG Diamond Ring 7.0g #8.5](http://koufuku.jp/cdn/shop/files/2000000042039_2.jpg?v=1763176024&width=480)
![[Pre-owned] K18WG DIAMOND Diamond Ring D1.00ct 7.3g #16](http://koufuku.jp/cdn/shop/files/2000000027364_2.jpg?v=1765879251&width=480)
![[Pre-owned] K18WG Diamond Ring, D1.13ct, with GGC Appraisal, 3.1g, Size 12](http://koufuku.jp/cdn/shop/files/2000000069357_3.jpg?v=1750472222&width=480)
![Used] K18WG DIAMOND Diamond Ring D2.07ct 8.7g #13.5](http://koufuku.jp/cdn/shop/files/2000000036946_2.jpg?v=1769397964&width=480)
![[Pre-owned] K18WG DIAMOND Diamond & Ruby Ring 0.886ct I Color SI2 Class CGL Certified D0.57ct R0.29ct 6.0g #13](http://koufuku.jp/cdn/shop/files/2000000044484_3.jpg?v=1760667249&width=480)
Sold Out
![[Pre-owned] K18WG Black & Colorless Diamond Pinky Ring BD0.40ct D0.28ct 4.5g #4](http://koufuku.jp/cdn/shop/files/2000000073088_2.jpg?v=1765877458&width=480)
![[Pre-owned] K18WG Colored Diamond Ring 0.643ct D0.97ct, includes appraisal report, 5.1g, size 12.5](http://koufuku.jp/cdn/shop/files/2000000025926_3.jpg?v=1765877450&width=480)
Sold Out
![[Pre-owned] K18WG DIAMOND Pendant Necklace D0.09ct 2.3g](http://koufuku.jp/cdn/shop/files/2000000055794_2.jpg?v=1765161776&width=480)
![[Pre-owned] K18WG Diamond Pendant Necklace D1.08ct 6.3g](http://koufuku.jp/cdn/shop/files/2000000021317_2.jpg?v=1763176024&width=480)
![[Pre-owned] K18WG Diamond Ring 0.321ct D0.16ct 4.0g #14](http://koufuku.jp/cdn/shop/files/2000000037301_2.jpg?v=1750923953&width=480)
![[Pre-owned] K18WG Diamond Ring, 0.493ct H Color SI2, D0.20ct, with GGL Sorting, 3.2g, Size #11.5](http://koufuku.jp/cdn/shop/files/2000000039824_3.jpg?v=1765877332&width=480)
![[Pre-owned] K18WG Diamond Ring 0.55ct D1.50ct 9.6g #13.5](http://koufuku.jp/cdn/shop/files/2000000039336_2.jpg?v=1750923953&width=480)
![[Pre-owned] K18WG Diamond Ring D0.35ct 2.0g #11](http://koufuku.jp/cdn/shop/files/2000000099309_2.jpg?v=1750923953&width=480)
![[Pre-owned] K18WG Diamond Ring D0.45ct 5.4g #12](http://koufuku.jp/cdn/shop/files/2000000053318_2.jpg?v=1765877332&width=480)
![[Pre-owned] K18WG Diamond Ring D0.55ct 5.1g #10.5](http://koufuku.jp/cdn/shop/files/2000000047331_2.jpg?v=1750923953&width=480)
![[Pre-owned] K18WG Diamond Ring D0.70ct 3.8g #11.5](http://koufuku.jp/cdn/shop/files/2000000053394_2.jpg?v=1750923953&width=480)
![[Pre-owned] K18WG Diamond Ring D1.56ct 6.0g #8](http://koufuku.jp/cdn/shop/files/2000000039084_2.jpg?v=1750923954&width=480)
![[Pre-owned] K18WG Diamond Ring D1.95ct 7.1g #12](http://koufuku.jp/cdn/shop/files/2000000039015_2.jpg?v=1766221258&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] K18WG DIAMOND Brown & Colorless Diamond Ring D1.63ct 7.4g #12](http://koufuku.jp/cdn/shop/files/2000000039114_2.jpg?v=1771814676&width=480)
![[Used] K18WG EMERALD EARRINGS Emerald Earrings E2.05ct E1.45ct D1.06ct D1.06ct 8.6g](http://koufuku.jp/cdn/shop/files/2000000043760_2.jpg?v=1783314555&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)