Showing 1790 products
![[Pre-owned] PT900/K18YG Thailand Ruby Ring, R2.96ct, with DGRS/GIA Report, 7.7g](http://koufuku.jp/cdn/shop/files/2000000035765_6.jpg?v=1753249893&width=480)
![[Used] PT900/K18YG TOURMALINE Pink Tourmaline Ring T1.86ct D0.41ct #10 6.0g](http://koufuku.jp/cdn/shop/files/2000000079127_2.jpg?v=1778737724&width=480)
![[Pre-owned] PT900/K18YG Garnet Ring 3.5g #7](http://koufuku.jp/cdn/shop/files/2000000037677_2.jpg?v=1760667270&width=480)
![[Pre-owned] PT900/PT850 Diamond Pendant Necklace 0.429ct D0.41ct 4.3g](http://koufuku.jp/cdn/shop/files/2000000021973_2.jpg?v=1765161777&width=480)
![[Pre-owned] PT900/PT850 RUBY Pendant Necklace R0.84ct D0.18ct 3.3g](http://koufuku.jp/cdn/shop/files/2000000074443_2.jpg?v=1765175628&width=480)
![[Pre-owned] PT900 Black Opal Ring, BO3.74ct D0.14ct, 7.4g, Size #17](http://koufuku.jp/cdn/shop/files/2000000016795_2.jpg?v=1763176059&width=480)
![[Pre-owned] PT950 Black Opal Ring, BO3.08ct D1.47ct, 7.8g, Size 11.5](http://koufuku.jp/cdn/shop/files/2000000006574_2.jpg?v=1763175991&width=480)
![[Pre-owned] PT950 BLACK OPAL Ring, BO4.35ct, D0.51ct, with Appraisal Certificate, 7.0g, Size 12](http://koufuku.jp/cdn/shop/files/2000000013152_2.jpg?v=1763176059&width=480)
![[Pre-owned] PT950 Black Opal Ring BO4.57ct D2.74ct 9.5g #11.5](http://koufuku.jp/cdn/shop/files/2000000031125_2.jpg?v=1763176059&width=480)
![[Pre-owned] PT950 DIAMOND RING D1.00ct 3.1g #14](http://koufuku.jp/cdn/shop/files/2000000145877_2.jpg?v=1789032227&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] PT950 EMERALD RING E1.42ct D0.44 GIA 5.5g #13](http://koufuku.jp/cdn/shop/files/2000000145952_3.jpg?v=1788155042&width=480)
![[Pre-owned] PT950 NO HEAT RUBY RING Mozambique Untreated Ruby Ring R2.07ct D1.08ct GRS Certified 9.1g #12](http://koufuku.jp/cdn/shop/files/2000000090658_3.jpg?v=1768444839&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] PT950 NO HEAT RUBY RING, 2.02ct Ruby, 1.69ct Diamond, Pigeon Blood, AIGS Certified, 11.3g, Size 12](http://koufuku.jp/cdn/shop/files/2000000018447_3.jpg?v=1768444671&width=480)
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![[Pre-owned] PT950 NO HEAT SAPPHIRE RING, Sri Lankan Unheated Sapphire, S2.69ct D1.97ct, GIA Report, 9.6g, Size 11](http://koufuku.jp/cdn/shop/files/2000000017525_2.jpg?v=1768444828&width=480)
![[Pre-owned] PT950 NO HEAT SAPPHIRE RING, Sri Lankan, Unheated Sapphire, S6.95ct, D1.11ct, with GIA Report, 9.4g, Size 12](http://koufuku.jp/cdn/shop/files/2000000023168_4.jpg?v=1768444829&width=480)
![[Pre-owned] PT950 NO HEAT SAPPHIRE RING, 2.45ct Sapphire, 0.70ct Diamond, GRS Certified, 8.9g, Size 13](http://koufuku.jp/cdn/shop/files/2000000082615_4.jpg?v=1768808621&width=480)
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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] PT950 RUBY RING, Burmese Ruby R3.681ct, D2.33ct, GIA certified, 9.5g, Size #12](http://koufuku.jp/cdn/shop/files/2000000024141_3.jpg?v=1765163849&width=480)
![[Pre-owned] PT950 RUBY RING Mozambique Ruby Ring R3.064ct D1.60ct with GIA Report 6.4g #12](http://koufuku.jp/cdn/shop/files/2000000018911_3.jpg?v=1765161777&width=480)
![[Pre-owned] PT950 Burmese Unheated Ruby Ring, R0.77ct D0.70ct, with GIA Report, 3.1g, #11](http://koufuku.jp/cdn/shop/files/2000000021997_3.jpg?v=1751698229&width=480)
![[Pre-owned] PT950 Ruby Ring, Thai Origin, R0.96ct D0.88ct, GIA Report, 5.2g, Size 12](http://koufuku.jp/cdn/shop/files/2000000098807_3.jpg?v=1760678193&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)