Showing 1964 products
![[Pre-owned] K18WG Black Opal Ring BO2.00ct D0.27ct 4.3g #12.5](http://koufuku.jp/cdn/shop/files/2000000036731_2.jpg?v=1767586070&width=480)
![[Pre-owned] K18WG Unheated Heart-Shaped Ruby Ring R1.12ct D0.32ct with AIGS "Pigeon Blood" Certificate, 3.1g, Size 13.5](http://koufuku.jp/cdn/shop/files/2000000034638_3.jpg?v=1767586070&width=480)
![[Pre-owned] PT900 MEXICO OPAL Ring OP1.59ct D0.22ct 5.8g #11](http://koufuku.jp/cdn/shop/files/2000000029542_2.jpg?v=1767586070&width=480)
![[Pre-owned] K18WG Burmese Ruby Ring, R1.18ct D0.96ct, with AIGS "Pigeon Blood" certificate, 3.9g, Size #13](http://koufuku.jp/cdn/shop/files/2000000069029_4.jpg?v=1767586051&width=480)
![[Pre-owned] K18YG DIAMOND & RUBY RING D0.35ct D0.20ct R0.46ct 5.1g #8.5](http://koufuku.jp/cdn/shop/files/2000000126210_2.jpg?v=1767586039&width=480)
![[Pre-owned] K18YG DIAMOND RING Diamond/Ruby Ring D0.40ct 3.1g #12.5](http://koufuku.jp/cdn/shop/files/2000000087917_2.jpg?v=1767586039&width=480)
![[Pre-owned] 18K WG Burmese Ruby Ring, Ruby 1.19ct, Diamond 0.68ct, with GUILD "Pigeon Blood" Certificate, 5.5g, Size 13](http://koufuku.jp/cdn/shop/files/2000000041575_3.jpg?v=1767586019&width=480)
![[Pre-owned] K18YG/WG Ruby Ring D0.42ct 6.8g #13](http://koufuku.jp/cdn/shop/files/2000000121680_2.jpg?v=1767586014&width=480)
![[Pre-owned] PT900 DIAMOND V-line Ring D0.46ct 5.8g #12](http://koufuku.jp/cdn/shop/files/2000000121840_2.jpg?v=1767586014&width=480)
![[Pre-owned] PT900/K18YG Diamond Ring D0.59ct 8.1g #8.5](http://koufuku.jp/cdn/shop/files/2000000126609_2.jpg?v=1767586002&width=480)
![[Pre-owned] K18YG/PT900 DIAMOND RING D1.00ct 11.8g #13](http://koufuku.jp/cdn/shop/files/2000000124544_2.jpg?v=1767586002&width=480)
![[Pre-owned] PT900 DIAMOND Ring D0.75ct 6.0g #15](http://koufuku.jp/cdn/shop/files/2000000107028_2.jpg?v=1767586001&width=480)
![[Pre-owned] K18WG/K18YG Colorless & Yellow Diamond Ring 14.6g #14](http://koufuku.jp/cdn/shop/files/2000000070018_2.jpg?v=1767586001&width=480)
![[Pre-owned] K18YG Diamond Cat Ring, 5.1g, Size 12.5](http://koufuku.jp/cdn/shop/files/2000000124483_2.jpg?v=1767586001&width=480)
![[Pre-owned] PT900 Diamond V-line Ring D0.90ct 5.6g #12](http://koufuku.jp/cdn/shop/files/2000000048871_2.jpg?v=1767586001&width=480)
![[Pre-owned] K18YG DIAMOND RING 1.01ct D0.79ct 5.7g #10](http://koufuku.jp/cdn/shop/files/2000000125510_2.jpg?v=1767585997&width=480)
![[Pre-owned] K18WG EMERALD Emerald Ring E0.921ct D0.15ct 2.5g #13](http://koufuku.jp/cdn/shop/files/2000000045290_2.jpg?v=1767585997&width=480)
![[Pre-owned] K18YG SAPPHIRE RING S0.87ct S0.54ct D0.294ct 6.5g #13.5](http://koufuku.jp/cdn/shop/files/2000000126272_2.jpg?v=1767585996&width=480)
![[Pre-owned] PT900 Peridot Ring P2.40ct D0.06ct with Appraisal Report, 7.0g, Size 19](http://koufuku.jp/cdn/shop/files/2000000120911_3.jpg?v=1767585997&width=480)
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![[Pre-owned] K18YG Emerald Ring E2.57ct D0.70ct 7.3g #11.5](http://koufuku.jp/cdn/shop/files/2000000040233_2.jpg?v=1767585996&width=480)
![[Pre-owned] K18 Diamond 0.503ct E Color VS1 Class 3Excellent H&C D0.07ct CGL Certificate 2.3g #10](http://koufuku.jp/cdn/shop/files/2000000044507_3.jpg?v=1767585997&width=480)
![[Pre-owned] K18WG/YG Blue & Yellow Sapphire Ring, S1.50ct D0.06ct, with NGL Appraisal, 9.3g, Size 12.5](http://koufuku.jp/cdn/shop/files/2000000124582_3.jpg?v=1767585996&width=480)
![[Pre-owned] PT900 EMERALD RING E2.66ct D0.55ct 8.1g #14](http://koufuku.jp/cdn/shop/files/2000000122038_2.jpg?v=1767585991&width=480)
![[Pre-owned] K18WG Emerald Ring E1.18ct D0.65ct 4.3g #11.5](http://koufuku.jp/cdn/shop/files/2000000069746_2.jpg?v=1767585991&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)