Showing 1961 products
![[Pre-owned] PT900 MEXICO OPAL Ring OP1.76ct D0.59ct 5.9g #12](http://koufuku.jp/cdn/shop/files/2000000094670_2.jpg?v=1766219021&width=480)
![[Pre-owned] K18YG Diamond Ring D0.50ct 3.1g #11](http://koufuku.jp/cdn/shop/files/2000000026718_2.jpg?v=1766219021&width=480)
![[Pre-owned] K18WG Burmese Ruby Ring, R1.35ct D1.37ct, AIGS Pigeon Blood, with Appraisal Certificate, 6.6g, Size 14](http://koufuku.jp/cdn/shop/files/2000000069012_4.jpg?v=1766219023&width=480)
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![[Pre-owned] PT900 Mexico Opal Ring OP2.19ct D0.21ct 6.1g #11](http://koufuku.jp/cdn/shop/files/2000000029672_2.jpg?v=1766219022&width=480)
![[Pre-owned] PT900 Mexican Opal Ring, OP2.05ct D0.66ct 9.4g #12](http://koufuku.jp/cdn/shop/files/2000000068657_2.jpg?v=1766219021&width=480)
![[Pre-owned] PT900 MEXICO OPAL Ring, MO6.27ct D1.35ct, 15.0g, Size 15](http://koufuku.jp/cdn/shop/files/2000000024004_2.jpg?v=1766219023&width=480)
![[Pre-owned] K18WG Colorless & Black Diamond Ring D0.26ct 2.2g #11.5](http://koufuku.jp/cdn/shop/files/2000000124650_2.jpg?v=1766219021&width=480)
![[Pre-owned] PT900 Ruby Ring R0.53ct D0.07ct 6.9g #16](http://koufuku.jp/cdn/shop/files/2000000124735_2.jpg?v=1766219022&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] Nobuko Ishikawa K18/PT900 Diamond Ring D0.26ct 8.6g #10](http://koufuku.jp/cdn/shop/files/2000000077314_2.jpg?v=1765877458&width=480)
![[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] PT900 South Sea Pearl Ring 10.8mm D0.18ct 6.9g #13](http://koufuku.jp/cdn/shop/files/2000000010106_2.jpg?v=1765877457&width=480)
![[Pre-owned] K18YG Coral Round Bead Ring 6.6mm 2.2g #](http://koufuku.jp/cdn/shop/files/2000000044927_2.jpg?v=1765877457&width=480)
![[Pre-owned] K18/PT900 Diamond Ring 0.397ct D0.43ct 4.0g #13](http://koufuku.jp/cdn/shop/files/2000000037646_2.jpg?v=1765877450&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)
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![[Pre-owned] PT900 Sapphire Ring, S4.132ct, D0.15ct, with NGL Appraisal, 7.8g, Size 11](http://koufuku.jp/cdn/shop/files/2000000095561_3.jpg?v=1765877448&width=480)
![[Pre-owned] K18 Diamond Ring D1.02ct 6.3g #15.5](http://koufuku.jp/cdn/shop/files/2000000106298_2.jpg?v=1765877448&width=480)
![[Pre-owned] PT900 Green Tourmaline Ring GT5.72ct D0.23ct 8.5g #15.5](http://koufuku.jp/cdn/shop/files/2000000011219_2.jpg?v=1765877448&width=480)
![[Pre-owned] PT900 Diamond Ring 0.250ct D0.13ct with CGL Certificate, 1.7g, Size #9](http://koufuku.jp/cdn/shop/files/2000000020143_3.jpg?v=1765877448&width=480)
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![[Pre-owned] PT900 Unheated Padparadscha Sapphire Ring 0.989ct D0.43ct GRS/GIA Certified 5.9g #11](http://koufuku.jp/cdn/shop/files/2000000012360_7.jpg?v=1765877430&width=480)
![[Pre-owned] PT900 Red Tourmaline (Rubellite) Ring 1.64ct, D0.52ct, with GRJ Sorting, 12.4g, Size 12.5](http://koufuku.jp/cdn/shop/files/2000000049632_3.jpg?v=1765877430&width=480)
![[Pre-owned] QUEEN (Heiwado & Co.) K18YG Diamond Ring D1.28ct 6.8g #15](http://koufuku.jp/cdn/shop/files/2000000010748_2.jpg?v=1765877430&width=480)
![[Pre-owned] PT1000 Diamond Ring 0.314ct D VS2 3Excellent (MB) D0.08ct CGL Sorting 3.5g #6.5](http://koufuku.jp/cdn/shop/files/2000000006871_3.jpg?v=1765877429&width=480)
![[Pre-owned] PT900 AQUAMARINE Ring AQ1.01ct D0.032ct 7.3g #11](http://koufuku.jp/cdn/shop/files/2000000090153_2.jpg?v=1765877430&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)