Showing 1787 products
![[Pre-owned] K18WG Burmese Ruby Ring, R1.42ct, D1.48ct, "Pigeon Blood," with AIGS certificate, 6.6g, Size 14](http://koufuku.jp/cdn/shop/files/2000000068992_4.jpg?v=1765877332&width=480)
![[Pre-owned] K18WG Myanmar Ruby Ring, R1.05ct D1.11ct "Pigeon Blood," with AIGS Certificate, 6.8g, Size 14](http://koufuku.jp/cdn/shop/files/2000000068961_4.jpg?v=1765877352&width=480)
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![[Pre-owned] K18WG Mozambique Unheated Ruby Ring R2.01ct D1.08ct 6.1g #12 GRS Certified](http://koufuku.jp/cdn/shop/files/2000000068985_4.jpg?v=1750401687&width=480)
![[Pre-owned] K18WG Mozambique Unheated Ruby Ring, R1.11ct D0.47ct, GRS Certified, 3.5g, #14](http://koufuku.jp/cdn/shop/files/2000000081991_3.jpg?v=1768444653&width=480)
![[Pre-owned] K18WG Mozambican Unheated Ruby Ring R2.10ct D0.70ct with GRS Certificate, 5.8g, Size #14](http://koufuku.jp/cdn/shop/files/DSC_2048.jpg?v=1761633681&width=480)
![[Pre-owned] K18WG Mozambican Unheated Ruby Ring R3.02ct D1.36ct with GRS Certificate, 6.7g, Size 12.5](http://koufuku.jp/cdn/shop/files/2000000092713_3.jpg?v=1766221258&width=480)
![[Pre-owned] K18WG Ruby Ring R0.68ct D0.33ct 2.9g #14](http://koufuku.jp/cdn/shop/files/69036_01_c42127e3-11c8-40b2-8fad-527280ba9a89.jpg?v=1743141669&width=480)
![[Pre-owned] K18WG Ruby Ring, R1.03ct D0.11ct, Pigeon Blood, AIGS Certificate, 2.2g](http://koufuku.jp/cdn/shop/files/2000000035895_3.jpg?v=1740381216&width=480)
![[Pre-owned] K18WG Ruby Pendant Necklace R0.51ct D0.10ct 3.0g](http://koufuku.jp/cdn/shop/files/2000000074368_2.jpg?v=1765175628&width=480)
![[Pre-owned] K18WG Ruby Ring R0.99ct D0.70ct, with AIGS Unheated Certificate, 2.8g, Size 13.5](http://koufuku.jp/cdn/shop/files/2000000047881_4.jpg?v=1764830276&width=480)
![[Pre-owned] K18WG RUBY Ring R1.16ct D0.15ct 2.6g #13.5](http://koufuku.jp/cdn/shop/files/2000000035987_2.jpg?v=1764830303&width=480)
![[Pre-owned] K18WG Ruby Ring, R2.45ct D0.76ct, Japan Jewelry Association Sorting, 4.9g, Size #12.5](http://koufuku.jp/cdn/shop/files/2000000071275_8.jpg?v=1748238748&width=480)
![[Pre-owned] K18WG Ruby Ring, Pigeon Blood, Unheated, R1.02ct D0.30ct, 3.6g, Size 14, with AIGS Certificate](http://koufuku.jp/cdn/shop/files/2000000034201_3.jpg?v=1750401687&width=480)
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![[Pre-owned] K18WG Ruby Mystery Setting Ring, R5.30ct, D1.10ct, 11.6g, Size 12](http://koufuku.jp/cdn/shop/files/2000000084435_2.jpg?v=1745911148&width=480)
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![[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] K18WG Unheated Ruby Ring R1.09ct D0.26ct with AIGS Certificate, 3.5g, Size 13](http://koufuku.jp/cdn/shop/files/2000000035963_3.jpg?v=1751698229&width=480)
![[Pre-owned] K18WG Burmese Ruby Ring, R1.35ct D1.37ct, AIGS Pigeon Blood, with Appraisal Certificate, 6.6g, Size 14](http://koufuku.jp/cdn/shop/files/2000000069012_4.jpg?v=1766219023&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] K18WG Madagascar Unheated Ruby Pendant Necklace R2.03ct D0.52ct, with GRS Certificate, 4.8g](http://koufuku.jp/cdn/shop/files/2000000042848_4.jpg?v=1765161893&width=480)
![[Pre-owned] K18WG Madagascar Unheated Ruby Ring R2.07ct D1.22ct with GRS Certificate 4.9g #13](http://koufuku.jp/cdn/shop/files/2000000093659_3.jpg?v=1759738564&width=480)
![[Pre-owned] K18WG Burmese Ruby Ring, R1.39ct D1.42ct, with AIGS Certificate, 6.5g, Size #13](http://koufuku.jp/cdn/shop/files/2000000070063_4.jpg?v=1759735437&width=480)
![[Pre-owned] K18WG Burmese Ruby Ring R1.05ct D0.50ct with AIGS Pigeon Blood Certificate, 3.0g, Size 14](http://koufuku.jp/cdn/shop/files/2000000047935_4.jpg?v=1764830345&width=480)
![[Pre-owned] K18WG Mozambique Unheated Ruby Pendant/Ring R2.08ct D1.32ct with AIGS "Pigeon Blood" Certificate, 7.4g, Size 13.5](http://koufuku.jp/cdn/shop/files/2000000090559_4.jpg?v=1765012877&width=480)
![[Pre-owned] K18WG Mozambican Unheated Ruby Ring 2.00ct D0.47ct, with GRS Certificate, 3.9g, Size 14](http://koufuku.jp/cdn/shop/files/2000000094762_3.jpg?v=1764830276&width=480)
![[Pre-owned] K18WG Mozambique Unheated Ruby Ring R0.99ct D0.52ct with GRS Certificate, 3.9g, Size 13](http://koufuku.jp/cdn/shop/files/2000000042879_4.jpg?v=1760667249&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)