Gems, Jewelry and Precious Metals
Showing 1854 products
![[Used] K18WG DIAMOND RING D1.14ct 7.2g #12](http://koufuku.jp/cdn/shop/files/2000000133706_2.jpg?v=1777881348&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] PT900 DIAMOND RING D1.00ct 13.5g #14.5](http://koufuku.jp/cdn/shop/files/2000000133652_2.jpg?v=1777881349&width=480)
![[Used] K18WG BLACK / COLORLESS DIAMOND RING Black/Colorless Diamond Ring BD0.19ct D0.21ct 13.2g #13.5](http://koufuku.jp/cdn/shop/files/2000000133638_2.jpg?v=1778732513&width=480)
![[Used] K18YG Sapphire Ring S0.38ct D1.00ct 10.3g #11.5](http://koufuku.jp/cdn/shop/files/2000000069777_9.jpg?v=1777881349&width=480)
![[Used] K18YG MULTI STONE RING Emerald/Ruby/Sapphire Ring 0.57ct 6.8g](http://koufuku.jp/cdn/shop/files/2000000131429_2.jpg?v=1778493621&width=480)
![[Used] K18YG/ONYX YELLOW SAPPHIRE RING YS1.32ct D0.28ct 11.2g #12 #15](http://koufuku.jp/cdn/shop/files/2000000133607_2.jpg?v=1777881348&width=480)
![Used] K18YG Sapphire Ring S1.10ct D0.23ct 4.9g #12](http://koufuku.jp/cdn/shop/files/2000000047393_8.jpg?v=1777881349&width=480)
![[Used] K18YG SAPPHIRE RING S1.00ct D0.30ct 7.5g #12.5](http://koufuku.jp/cdn/shop/files/2000000133621_2.jpg?v=1778493298&width=480)
![[Used] JEWEL STUDIO K18/PT900/QUARTZ SAPPHIRE RING Violet Sapphire Ring S2.94ct D0.93ct with sorting certificate 25.3g #12 ONE PRICE](http://koufuku.jp/cdn/shop/files/2000000129921_3.jpg?v=1778494008&width=480)
![[Used] PT900 EMERALD RING E2.323ct D0.226ct 8.1g #20](http://koufuku.jp/cdn/shop/files/2000000013046_2.jpg?v=1778489656&width=480)
![[Used] PT900 STAR RUBY RING Star Ruby Ring SR1.38ct D0.30ct D0.57ct 16.2g #13](http://koufuku.jp/cdn/shop/files/2000000021621_2.jpg?v=1778489988&width=480)
![[Used] PT900 EMERALD RING Emerald/Diamond Ring E0.53ct D0.38ct 13.0g #11.5](http://koufuku.jp/cdn/shop/files/2000000133676_2.jpg?v=1778492460&width=480)
![[Used] K18WG MYANMAR RUBY BRACELET Myanmar Ruby Bracelet R5.34ct D1.92ct Authenticated 13.1g 18.5cm](http://koufuku.jp/cdn/shop/files/2000000049762_4.jpg?v=1779337915&width=480)
![[Used] PM RUBY RING Platinum Ruby Ring R0.58ct CGL Sorting 4.5g #10.5](http://koufuku.jp/cdn/shop/files/2000000125640_3.jpg?v=1779340011&width=480)
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![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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KOUFUKU is an e-commerce site that handles a wide range of products, from jewelry and precious metals to brand bags, brand watches, brand apparel, and tableware. In addition to sales, we also offer a purchase service.