Showing 1961 products
![[Pre-owned] PT900 BLACK OPAL Ring BO1.65ct D0.56ct 8.4g #10](http://koufuku.jp/cdn/shop/files/2000000088020_2.jpg?v=1760667250&width=480)
![[Pre-owned] PT900 Mozambique Unheated Ruby Ring R1.02ct D0.66ct GRS Pigeon Blood, with certificate, 7.4g, size 16](http://koufuku.jp/cdn/shop/files/2000000070766_3.jpg?v=1760667249&width=480)
![[Pre-owned] PT900 Burmese Ruby Ring, R1.505ct D1.02ct, GIA Report, 8.2g, Size #12](http://koufuku.jp/cdn/shop/files/2000000006680_3.jpg?v=1760667249&width=480)
![[Pre-owned] Isako Kikuchi Design K18YG GARNET Ring D0.19 GRJ Sorting 11.1g #12](http://koufuku.jp/cdn/shop/files/2000000077826_3.jpg?v=1760667250&width=480)
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![[Pre-owned] K18WG Sapphire Ring, S13.31ct D0.55ct, NGL Report, 8.9g, Size 14.5](http://koufuku.jp/cdn/shop/files/2000000095868_3.jpg?v=1760667250&width=480)
![[Pre-owned] PT900 Opal Ring OP2.49ct D0.60ct 10.1g #15.5](http://koufuku.jp/cdn/shop/files/2000000011332_2.jpg?v=1760667250&width=480)
![[Pre-owned] K18WG Jadeite Ring J4.99ct D0.56ct, with Japan Gem Sciences Association sorting, 6.1g, Size #12](http://koufuku.jp/cdn/shop/files/2000000044187_2.jpg?v=1760667250&width=480)
![[Pre-owned] PT900 Alexandrite Ring, A0.73ct D0.33ct, includes Gem Research Japan sorting, size 11](http://koufuku.jp/cdn/shop/files/2000000021812_3.jpg?v=1760667250&width=480)
![[Pre-owned] PT900 RUBY Ruby Ring R0.36ct D0.08ct 3.6g #12](http://koufuku.jp/cdn/shop/files/2000000106847_2.jpg?v=1760667250&width=480)
![[Pre-owned] PT900 JADEITE Ring J4.40ct 0.55ct 6.8g #12](http://koufuku.jp/cdn/shop/files/2000000071084_2.jpg?v=1760667250&width=480)
![[Pre-owned] PT900 DIAMOND Ring D1.00ct 6.3g #12](http://koufuku.jp/cdn/shop/files/2000000087818_2.jpg?v=1760667249&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] K18YG Cantera Opal Ring OP6.47ct D0.04ct 8.2g #14](http://koufuku.jp/cdn/shop/files/2000000076782_2.jpg?v=1760667249&width=480)
![[Pre-owned] K18WG Aquamarine Ring AQ2.31ct D0.47ct 4.6g #14](http://koufuku.jp/cdn/shop/files/2000000045337_2.jpg?v=1760667250&width=480)
![[Pre-owned] PT900 WHITE OPAL Ring OP4.30ct D0.59ct 11.9g #11](http://koufuku.jp/cdn/shop/files/2000000011325_2.jpg?v=1760667250&width=480)
![[Pre-owned] K18WG JADEITE Ring J3.726ct D0.57ct 5.3g #13.5](http://koufuku.jp/cdn/shop/files/2000000040141_2.jpg?v=1760667250&width=480)
![[Pre-owned] K18YG Sapphire Ring S1.16ct D1.21ct 7.2g #11.5](http://koufuku.jp/cdn/shop/files/2000000052892_2.jpg?v=1760667249&width=480)
![[Pre-owned] K18YG Ruby Ring R1.01ct D2.00ct 6.5g #10.5](http://koufuku.jp/cdn/shop/files/DSC_2008.jpg?v=1761632400&width=480)
![[Pre-owned] K18WG SAPPHIRE Sapphire Ring S2.022ct D0.18ct 3.6g #11.5](http://koufuku.jp/cdn/shop/files/2000000036885_2.jpg?v=1760667249&width=480)
![[Pre-owned] K18WG DIAMOND Diamond & Ruby Ring 0.886ct I Color SI2 Class CGL Certified D0.57ct R0.29ct 6.0g #13](http://koufuku.jp/cdn/shop/files/2000000044484_3.jpg?v=1760667249&width=480)
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![[Used] K18WG PURPLE SAPPHIRE RING PS1.428ct D0.93ct 4.5g #12.5](http://koufuku.jp/cdn/shop/files/2000000070025_2.jpg?v=1760667250&width=480)
![[Pre-owned] K18WG Tanzanite Ring T2.89ct D0.44ct 3.8g #13](http://koufuku.jp/cdn/shop/files/2000000045375_3.jpg?v=1760667249&width=480)
![[Pre-owned] K18WG Sapphire Ring S2.08ct D0.98ct 4.8g #13](http://koufuku.jp/cdn/shop/files/2000000045788_2.jpg?v=1760667249&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)