Showing 1964 products
![[Pre-owned] PT900 JADEITE RING J3.25ct D0.31ct CGL Sorting 5.7g #17.5](http://koufuku.jp/cdn/shop/files/2000000022192_3.jpg?v=1768806607&width=480)
![[Pre-owned] PT900 JADEITE RING 1.51ct J / 0.24ct D, 5.5g, Size 10.5](http://koufuku.jp/cdn/shop/files/2000000065878_2.jpg?v=1768806607&width=480)
![[Used] PT900 DIAMOND RING Diamond Ring 0.330ct D0.55ct 2.3g #8](http://koufuku.jp/cdn/shop/files/2000000121956_2.jpg?v=1768806607&width=480)
![[Pre-owned] PT900 BLACK OPAL RING BO3.48ct D2.00ct with GRJ Sorting, 11.8g, Size 12](http://koufuku.jp/cdn/shop/files/DSC_6311.jpg?v=1771668261&width=480)
![[Pre-owned] PT900 SAPPHIRE RING S1.35ct D0.65ct with NGL Appraisal, 13.0g, Size 14](http://koufuku.jp/cdn/shop/files/2000000018959_2.jpg?v=1768800610&width=480)
![[Pre-owned] K18WG Black Opal Ring BO1.50ct D0.38ct 3.5g #13.5](http://koufuku.jp/cdn/shop/files/2000000047874_2.jpg?v=1768800609&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 Opal Ring BO3.10ct D0.14ct 4.8g #13](http://koufuku.jp/cdn/shop/files/2000000036663_2.jpg?v=1768800609&width=480)
![[Pre-owned] K18WG BOULDER OPAL RING OP5.46ct D0.61ct 6.4g #14](http://koufuku.jp/cdn/shop/files/2000000070612_2.jpg?v=1768800609&width=480)
![[Pre-owned] K18WG Black Opal Ring, BO 1.65ct, D 0.40ct, with CGL Sorting, 4.5g, Size 13](http://koufuku.jp/cdn/shop/files/2000000050294_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)
![[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] PT900 SAPPHIRE RING, S2.00ct D1.08ct, CGL Sorting, 9.5g, #15](http://koufuku.jp/cdn/shop/files/2000000019239_3.jpg?v=1768800609&width=480)
![[Pre-owned] PT900 WHITE OPAL RING D0.43ct 9.2g #8.5](http://koufuku.jp/cdn/shop/files/2000000017716_2.jpg?v=1768800609&width=480)
![[Pre-owned] PT900 BLACK OPAL RING BO3.51ct D1.38ct 13.8g #10](http://koufuku.jp/cdn/shop/files/DSC_4703.jpg?v=1777278503&width=480)
![[Pre-owned] K18WG Black Opal Ring, Black Opal 1.44ct, Diamond 0.52ct, 3.1g, Size 13.5](http://koufuku.jp/cdn/shop/files/2000000036588_2.jpg?v=1768800609&width=480)
![[Pre-owned] K18WG OPAL RING OP0.93ct D0.12ct 3.4g #13.5](http://koufuku.jp/cdn/shop/files/2000000045191_2.jpg?v=1768800609&width=480)
![[Pre-owned] PT900 STAR SAPPHIRE RING SS7.92ct D0.57ct 8.8g #14](http://koufuku.jp/cdn/shop/files/2000000003917_2.jpg?v=1768800609&width=480)
![[Pre-owned] PT900 White Opal Ring OP0.80ct D0.30ct 5.9g #10](http://koufuku.jp/cdn/shop/files/2000000071749_2.jpg?v=1768800609&width=480)
![[Pre-owned] PT950 NO HEAT RUBY RING Mozambique Unheated Ruby Ring R1.37ct D0.77ct 5.0g #12](http://koufuku.jp/cdn/shop/files/2000000095271_2.jpg?v=1768459981&width=480)
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![[Pre-owned] PT900 JADEITE RING J13.16ct D1.87ct 13.9g #16](http://koufuku.jp/cdn/shop/files/2000000082417_2.jpg?v=1768446423&width=480)
![[Pre-owned] PT900 EMERALD RING E0.66ct D0.60ct 5.3g #12.5](http://koufuku.jp/cdn/shop/files/2000000115122_2.jpg?v=1768446422&width=480)
![[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] PT900 JADEITE RING 5.88ct / D0.58ct 6.7g #14](http://koufuku.jp/cdn/shop/files/2000000090023_2.jpg?v=1768446384&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)