Showing 1961 products
![[Pre-owned] PT900 DIAMOND Ring D0.15ct 4.5g #8](http://koufuku.jp/cdn/shop/files/2000000033600_2.jpg?v=1765877331&width=480)
![[Pre-owned] PT900 Diamond 0.355ct, E Color, VS1, Excellent Cut, VSB, CGL Certificate, 3.5g, Size #9](http://koufuku.jp/cdn/shop/files/2000000099217_3.jpg?v=1765877331&width=480)
![[Pre-owned] PT900 MEXICO OPAL Ring, D0.20ct, 8.3g, #9](http://koufuku.jp/cdn/shop/files/2000000102085_2.jpg?v=1765877331&width=480)
![[Pre-owned] PT900 EMERALD RING E1.51ct D0.69ct 9.7g #12](http://koufuku.jp/cdn/shop/files/2000000094601_2_2.jpg?v=1766993836&width=480)
![[Pre-owned] K18YG AKOYA PEARL Ring 9.6mm 4.3g #13.5](http://koufuku.jp/cdn/shop/files/2000000099330_2.jpg?v=1765877331&width=480)
![[Pre-owned] K18WG EMERALD RING E1.83ct D0.52ct 3.7g #14](http://koufuku.jp/cdn/shop/files/DSC_2008_488b48d0-0624-4a80-85b2-f5970e332319.jpg?v=1775188643&width=480)
![[Pre-owned] K18YG Sapphire Ring S0.89ct D1.18ct with Sorting, 5.8g, #13](http://koufuku.jp/cdn/shop/files/2000000117089_3.jpg?v=1765877331&width=480)
![[Pre-owned] PT950 Diamond Ring 0.30ct D Color IF Clarity 3Excellent, with 0.24ct side diamonds, 3.0g, Size 4](http://koufuku.jp/cdn/shop/files/2000000033488_2.jpg?v=1765877331&width=480)
![[Pre-owned] PT900 SAPPHIRE Sapphire Ring S1.57ct D0.15ct 6.6g #10](http://koufuku.jp/cdn/shop/files/2000000026497_2.jpg?v=1765877331&width=480)
![[Pre-owned] PT900/K18YG Myanmar Ruby Ring, R1.58ct D0.54ct, with NGL Appraisal, 14.2g, Size #12](http://koufuku.jp/cdn/shop/files/2000000068435_3.jpg?v=1765877331&width=480)
![[Pre-owned] K18/PT900 Diamond Ring 0.35ct 3.1g #11](http://koufuku.jp/cdn/shop/files/2000000093017_2.jpg?v=1765877331&width=480)
![[Pre-owned] PT900 Marquise Cut Diamond Ring 1.006ct, G Color, I1 Clarity, D0.36ct, CGL Certified, 8.0g, Size 18.5](http://koufuku.jp/cdn/shop/files/2000000014470_3.jpg?v=1765877331&width=480)
![[Pre-owned] K18WG South Sea Pearl Ring 14mm 10.3g #12](http://koufuku.jp/cdn/shop/files/2000000038209_2.jpg?v=1765877331&width=480)
![[Pre-owned] K18YG Akoya Pearl Ring 3.3mm-3.8mm 3.7g #9](http://koufuku.jp/cdn/shop/files/2000000099224_2.jpg?v=1765877331&width=480)
![[Pre-owned] PT900/K18YG DIAMOND Ring 0.426ct 3.1g #7](http://koufuku.jp/cdn/shop/files/2000000099286_2.jpg?v=1765877331&width=480)
![[Pre-owned] BVLGARI Ring PT950 DIAMOND Diamond Ring, with repair certificate and box, 12.5g, size #12.5, ONE PRICE](http://koufuku.jp/cdn/shop/files/2000000076065_4.jpg?v=1765877331&width=480)
![[Pre-owned] K18YG RUBY SAPPHIRE Ring R0.70ct S0.70ct D1.00ct 9.0g #14.5](http://koufuku.jp/cdn/shop/files/2000000069265_2.jpg?v=1765175887&width=480)
![[Pre-owned] K18WG Mozambique Unheated Ruby Ring R2.04ct D1.36ct with GRS Certificate, 4.2g, Size 13](http://koufuku.jp/cdn/shop/files/2000000042893_3.jpg?v=1765175649&width=480)
![[Pre-owned] K18WG Tanzanite Ring T1.28ct D0.33ct 5.8g #9.5](http://koufuku.jp/cdn/shop/files/2000000037738_3.jpg?v=1765175629&width=480)
![[Pre-owned] RING K18YG Thai Ruby Ring R3.21ct D2.51ct with GRS "intense to vivid red" certificate, 14.4g, size 13.5](http://koufuku.jp/cdn/shop/files/2000000113975_3.jpg?v=1765175629&width=480)
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![[Pre-owned] K18YG MABE PEARL NECKLACE 5.7g 13.8mm](http://koufuku.jp/cdn/shop/files/2000000114101_2.jpg?v=1765175629&width=480)
![[Pre-owned] PT900 TOURMALINE Ring T7.24ct D0.22ct 10.1g #12](http://koufuku.jp/cdn/shop/files/2000000113920_2.jpg?v=1765175629&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] K18WG Green Tourmaline Pendant Necklace T4.27ct D0.27ct 11.7g](http://koufuku.jp/cdn/shop/files/2000000106090_2.jpg?v=1765175629&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)