Showing 1787 products
![[Pre-owned] K18WG Mozambican Unheated Ruby Ring, R2.00ct D1.51ct, GRS Certified, 6.4g, Size 12.5](http://koufuku.jp/cdn/shop/files/2000000094380_3.jpg?v=1759735437&width=480)
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![[Pre-owned] K18WG Mozambique Unheated Ruby Ring R2.02ct D0.64ct with GRS Certificate 5.1g Size 14](http://koufuku.jp/cdn/shop/files/2000000071497_3.jpg?v=1764830276&width=480)
![[Pre-owned] K18WG Mozambique Unheated Ruby Ring R2.03ct D0.39ct with GRS Certificate, 3.7g, Size 12.5](http://koufuku.jp/cdn/shop/files/2000000070124_3.jpg?v=1765877332&width=480)
![[Pre-owned] K18WG Mozambique Unheated Ruby Ring R3.03ct D1.13ct GRS Certified, 8.0g, Size 13.5](http://koufuku.jp/cdn/shop/files/2000000034348_4.jpg?v=1765012878&width=480)
![[Pre-owned] K18WG Ruby Necklace R4.40ct D3.70ct 58.2g](http://koufuku.jp/cdn/shop/files/2000000114484_2.jpg?v=1765161777&width=480)
![[Pre-owned] K18WG Ruby Ring R1.73ct D0.17ct 4.0g #11.5](http://koufuku.jp/cdn/shop/files/DSC_2057.jpg?v=1761633954&width=480)
![[Pre-owned] K18WG Ruby Ring R10.05ct D2.23ct 14.4g #13.5](http://koufuku.jp/cdn/shop/files/2000000045122_2.jpg?v=1765159208&width=480)
![[Pre-owned] K18WG Ruby & Diamond Bracelet R1.05ct D0.108ct 6.6g 17.5cm](http://koufuku.jp/cdn/shop/files/2000000106335_2.jpg?v=1768197671&width=480)
![[Pre-owned] K18WG Ruby & Diamond Ring R2.40ct D0.33ct 7.0g #17](http://koufuku.jp/cdn/shop/files/2000000087269_2.jpg?v=1762397786&width=480)
![[Pre-owned] K18WG Heated Ruby Pendant Necklace, Ruby 1.05ct, Diamond 0.40ct, Pigeon Blood, AIGS Certified, 3.2g](http://koufuku.jp/cdn/shop/files/2000000050836_4.jpg?v=1769398643&width=480)
![[Pre-owned] K18WG Non-heated Ruby Ring R1.02ct D0.58ct AIGS Pigeon Blood, with certificate, 3.8g](http://koufuku.jp/cdn/shop/files/2000000036014_3.jpg?v=1765161777&width=480)
![[Pre-owned] K18WG Heated Ruby Ring, R1.03ct D0.19ct, with AIGS Pigeon Blood Certificate, 3.0g, Size 14](http://koufuku.jp/cdn/shop/files/2000000035925_4.jpg?v=1764830345&width=480)
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![[Pre-owned] K18WG Heated Ruby Ring, Ruby 1.04ct, Diamond 0.22ct, with AIGS Pigeon Blood Certificate, 3.1g, Size 13.5](http://koufuku.jp/cdn/shop/files/2000000036564_3.jpg?v=1764830276&width=480)
![[Pre-owned] K18WG Heated-free Ruby Ring, R1.08ct D0.89ct, AIGS Pigeon Blood, 4.1g, Size 12.5](http://koufuku.jp/cdn/shop/files/2000000034508_3.jpg?v=1759735437&width=480)
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![[Pre-owned] K18WG Heated Ruby Ring R1.12ct D0.75ct with AIGS Pigeon Blood Certificate, 4.1g #13](http://koufuku.jp/cdn/shop/files/2000000036694_3.jpg?v=1764830277&width=480)
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![[Pre-owned] K18WG Heated Ruby Ring, R1.18ct D0.53ct, AIGS Pigeon Blood, with Appraisal Certificate, 3.2g, Size 14](http://koufuku.jp/cdn/shop/files/2000000036045_4.jpg?v=1764830345&width=480)
![[Pre-owned] K18WG SAPPHIRE DIAMOND RING Sapphire 3.90ct / Diamond 0.80ct 13.2g #17.5](http://koufuku.jp/cdn/shop/files/2000000116532_2.jpg?v=1771313065&width=480)
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![[Used] K18WG SAPPHIRE EARRING Sapphire Earrings S5.12ct D0.18ct 5.1g](http://koufuku.jp/cdn/shop/files/2000000115085_2.jpg?v=1783913836&width=480)
![[Pre-owned] K18WG SAPPHIRE EARRING S2.57ct S2.70ct D0.93ct 8.1g](http://koufuku.jp/cdn/shop/files/2000000073712_2.jpg?v=1771658081&width=480)
![[Pre-owned] K18WG Fancy Color Sapphire Earrings S8.50ct D0.16ct with Appraisal Report, 6.7g](http://koufuku.jp/cdn/shop/files/2000000129471_3.jpg?v=1771316723&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 SAPPHIRE EARRINGS Briolette Cut Colored Sapphire Earrings 3.7g](http://koufuku.jp/cdn/shop/files/2000000133928_2.jpg?v=1786341311&width=480)
![[Used] K18WG SAPPHIRE EARRINGS Briolette Cut Color Sapphire Earrings 3.8g](http://koufuku.jp/cdn/shop/files/2000000133911_2.jpg?v=1785743788&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)