Gems, Jewelry, and Precious Metals
Showing 1929 products
![[Pre-owned] K18WG Colombian Emerald Ring, E5.13ct D1.10ct, with GRS Certificate, 6.9g, Size 15](http://koufuku.jp/cdn/shop/files/2000000038797_3.jpg?v=1765159207&width=480)
![[Pre-owned] K18WG Ruby Ring R6.03ct D3.63ct with GRS Certificate, 11.0g, Size #14](http://koufuku.jp/cdn/shop/files/2000000068954_3.jpg?v=1765159207&width=480)
![[Pre-owned] K18WG Chrysoberyl Ring C0.808ct D0.35ct 4.5g #14](http://koufuku.jp/cdn/shop/files/2000000079967_3.jpg?v=1765159207&width=480)
![[Pre-owned] K18WG High-quality Sri Lankan Sapphire Ring, S10.69ct D2.10ct, with GRS Certificate, 9.8g, Size 14](http://koufuku.jp/cdn/shop/files/2000000034881_3.jpg?v=1765159209&width=480)
![[Pre-owned] PT900 SAPPHIRE Ring S0.71ct D0.17ct 5.0g #14](http://koufuku.jp/cdn/shop/files/2000000044880_2.jpg?v=1765159208&width=480)
![[Pre-owned] K18WG Colombian Emerald Ring, E4.97ct, D0.57ct, with GRS Certificate, 11.8g, Size 13](http://koufuku.jp/cdn/shop/files/2000000093604_3.jpg?v=1765159207&width=480)
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![[Pre-owned] PT900 RUBY Ring R1.17ct D0.67ct 10.4g #14](http://koufuku.jp/cdn/shop/files/2000000026015_2.jpg?v=1765159208&width=480)
![[Pre-owned] MIKIMOTO K18WG Clasp Akoya Pearl Necklace 7.0mm 32.4g BOX ONE PRICE](http://koufuku.jp/cdn/shop/files/2000000006376_2.jpg?v=1765161777&width=480)
![[Pre-owned] LOUIS VUITTON Necklace K18WG Necklace 27.6g ONE PRICE](http://koufuku.jp/cdn/shop/files/2000000114712_2.jpg?v=1765161776&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] K18YG Onyx Necklace 18.2g](http://koufuku.jp/cdn/shop/files/2000000047966_2.jpg?v=1765161776&width=480)
![[Pre-owned] K18YG DIAMOND RING 0.327ct H-color VVS2 Good D0.50ct CGL Certified 1.8g #11.5](http://koufuku.jp/cdn/shop/files/2000000038216_3.jpg?v=1765161777&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 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 DIAMOND Pendant Necklace D0.09ct 2.3g](http://koufuku.jp/cdn/shop/files/2000000055794_2.jpg?v=1765161776&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] K18 Mozambique Unheated Ruby Ring R2.17ct D2.37ct with GRS Certificate, 6.8g, Size 13.5](http://koufuku.jp/cdn/shop/files/2000000089232_3.jpg?v=1765161777&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 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 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] K18YG EMERALD Necklace E0.65ct 45.8g](http://koufuku.jp/cdn/shop/files/2000000117348_2.jpg?v=1765161777&width=480)
![[Pre-owned] PT850/PT900 Padparadscha Sapphire Pendant Necklace 0.757ct, D0.06ct, with CGL Appraisal Report, 3.8g](http://koufuku.jp/cdn/shop/files/2000000029160_3.jpg?v=1765161776&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 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] 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)