Showing 1787 products
![[Pre-owned] K18WG Ruby, Pink Sapphire, and Diamond Mystery Setting Ring R3.00ct PS3.10ct D2.30ct 11.7g #13](http://koufuku.jp/cdn/shop/files/2000000143651_2.jpg?v=1786344576&width=480)
![[Pre-owned] K18WG Ruby Ring, Cabochon Cut Ruby R4.11ct D0.34ct 12.0g #13.5](http://koufuku.jp/cdn/shop/files/2000000070896_2.jpg?v=1789101816&width=480)
![[Pre-owned] K18WG Burmese No-Heat Ruby Ring R2.04ct D3.52ct with GRS "Pigeon Blood" Certificate, 11.3g, Size 11](http://koufuku.jp/cdn/shop/files/2000000045436_3.jpg?v=1765161777&width=480)
![[Pre-owned] K18WG Burmese Unheated Ruby Ring R2.05ct D2.42ct, with GRS Certificate, 11.4g, Size 12](http://koufuku.jp/cdn/shop/files/2000000088709_2.jpg?v=1765161777&width=480)
![[Pre-owned] K18WG Burma Unheated Ruby Ring R2.37ct D1.91ct GIA Certificate 7.2g #13](http://koufuku.jp/cdn/shop/files/2000000073477_3.jpg?v=1765175629&width=480)
![[Pre-owned] K18WG Madagascar Unheated Ruby Ring R2.05ct D1.59ct GRS Certified 8.5g #13.5](http://koufuku.jp/cdn/shop/files/2000000042428_4.jpg?v=1765175629&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] K18WG Mozambique Ruby Ring, R3.08ct D1.54ct, AIGS "Pigeon Blood", 7.6g, #13.5](http://koufuku.jp/cdn/shop/files/2000000068299_5.jpg?v=1765161776&width=480)
![[Pre-owned] K18WG Mozambican Unheated Ruby Ring R2.02 D1.58ct with GRS Certificate, 8.3g, Size 14](http://koufuku.jp/cdn/shop/files/2000000070087_3.jpg?v=1765161777&width=480)
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![[Pre-owned] K18WG Mozambique Unheated Ruby Ring, R2.02ct D1.92ct, with AIGS "Pigeon Blood" certificate, 8.7g, Size 13.5](http://koufuku.jp/cdn/shop/files/2000000071824_4.jpg?v=1765161777&width=480)
![[Pre-owned] K18WG Mozambique Unheated Ruby Ring R2.04ct D1.36ct with GRS Certificate, 4.2g, Size 13](http://koufuku.jp/cdn/shop/files/2000000042893_3.jpg?v=1765175649&width=480)
![[Pre-owned] K18WG Mozambique Unheated Ruby Ring R2.05ct D1.62ct with GRS Certificate, 6.2g](http://koufuku.jp/cdn/shop/files/2000000094410_3.jpg?v=1765161777&width=480)
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![[Pre-owned] K18WG Ruby Ring, Mozambique Unheated Ruby Ring, R2.26ct D0.90ct, GRS Certified, 4.2g, Size 13](http://koufuku.jp/cdn/shop/files/2000000071152_3.jpg?v=1765161864&width=480)
![[Pre-owned] K18WG Mozambique Unheated Ruby Ring R3.03ct D1.69ct with GRS Certificate, 7.7g, Size 13.5](http://koufuku.jp/cdn/shop/files/2000000070162_3.jpg?v=1765161776&width=480)
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![[Pre-owned] K18WG Ruby Ring, Mozambique Unheated Ruby Ring R3.09ct D1.88ct, GRS Certified, 8.7g, Size 13.5](http://koufuku.jp/cdn/shop/files/2000000041438_4.jpg?v=1765161777&width=480)
![[Pre-owned] K18WG Mozambique Unheated Ruby Ring R5.47ct D2.36ct 7.0g #11](http://koufuku.jp/cdn/shop/files/2000000034775_3.jpg?v=1765161863&width=480)
![[Pre-owned] K18WG Ruby Ring R0.21ct PS0.09ct D0.07ct w/ Guarantee & Sorting Report, 3.3g, Size 13](http://koufuku.jp/cdn/shop/files/2000000075112_3.jpg?v=1768808641&width=480)
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![[Used] K18WG RUBY RING Ruby ring R0.54ct D0.03ct 3.0g #15.5](http://koufuku.jp/cdn/shop/files/2000000044361_2.jpg?v=1764830277&width=480)
![[Used] K18WG RUBY RING R0.71ct D1.02ct 8.4g #13](http://koufuku.jp/cdn/shop/files/2000000005621_2.jpg?v=1782450001&width=480)
![[Pre-owned] K18WG RUBY RING R0.81ct D1.50ct 9.7g](http://koufuku.jp/cdn/shop/files/2000000122373_2.jpg?v=1771053915&width=480)
![[Pre-owned] K18WG RUBY RING R0.94ct D1.19ct 4.6g #13.5](http://koufuku.jp/cdn/shop/files/2000000040677_2.jpg?v=1768808719&width=480)
![[Pre-owned] K18WG Mozambican Unheated Ruby Ring R2.00ct D1.49ct with GRS Certificate, 6.4g, Size 13](http://koufuku.jp/cdn/shop/files/2000000068596_3.jpg?v=1765161777&width=480)
![[Used] K18WG RUBY SAPPHIRE EMERALD RING RSE2.06ct D0.02ct with Certification 13.6g #11.5](http://koufuku.jp/cdn/shop/files/2000000125268_3.jpg?v=1779430152&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] 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)