Gems, Jewelry, and Precious Metals
Showing 1929 products
![[Pre-owned] PT900 Thai Ruby Ring R1.22ct D0.65ct with GRS Certificate, 6.1g, Size 8](http://koufuku.jp/cdn/shop/files/2000000082400_4.jpg?v=1751698229&width=480)
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![[Pre-owned] K18WG Pink Sapphire Unheated Pink Sapphire Ring PS3.10ct D0.50ct AIGS/GRS Certified 4g #13.5](http://koufuku.jp/cdn/shop/files/2000000045108_4.jpg?v=1751698229&width=480)
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![[Pre-owned] PT900 AQUAMARINE Ring, Aquamarine 8.31ct, Diamond 0.47ct, 9.3g, Size 13](http://koufuku.jp/cdn/shop/files/2000000083001_2.jpg?v=1752392449&width=480)
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![[Pre-owned] K18YG SAPPHIRE Ring S1.90ct D0.20ct 4.9g #15](http://koufuku.jp/cdn/shop/files/2000000075518_2.jpg?v=1752392449&width=480)
![[Pre-owned] K14WG Tourmaline Ring 2.4g #16](http://koufuku.jp/cdn/shop/files/2000000078359_2.jpg?v=1752392449&width=480)
![[Pre-owned] K18YG Pink Tourmaline Ring T0.67ct D0.14ct 3.1g #5](http://koufuku.jp/cdn/shop/files/2000000080543_2.jpg?v=1752392449&width=480)
![[Pre-owned] K18YG Emerald Ring 4.5g #10](http://koufuku.jp/cdn/shop/files/2000000070919_2.jpg?v=1752392450&width=480)
![[Pre-owned] K18WG Black Opal & Sapphire Ring, BO 4.10ct, S 1.19ct, with JBS Grading Report, 4.1g, Size #14](http://koufuku.jp/cdn/shop/files/2000000071121_3.jpg?v=1752392449&width=480)
![[Pre-owned] K18WG Emerald Ring E1.77ct D0.55ct 3.9g #14](http://koufuku.jp/cdn/shop/files/2000000071534_2.jpg?v=1752392450&width=480)
![[Pre-owned] PT900 Jadeite Ring D1.897 JGGC Mini Appraisal Report 14.1g #12](http://koufuku.jp/cdn/shop/files/2000000085913_3.jpg?v=1752392449&width=480)
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![[Used] Mitsukoshi PM EMERALD RING E0.85ct D0.44ct 4.3g #10 Handmade](http://koufuku.jp/cdn/shop/files/2000000087795_2.jpg?v=1752392450&width=480)
![[Pre-owned] PT900 Kunzite Ring, Kunzite 10.01ct, Diamond 0.34ct, with JGGC Mini Appraisal, 10.2g, Size 12.5](http://koufuku.jp/cdn/shop/files/2000000085883_3.jpg?v=1752392449&width=480)
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![[Pre-owned] K18WG Sapphire Ring S1.25ct D0.29ct 5.2g #13](http://koufuku.jp/cdn/shop/files/2000000073040_2.jpg?v=1752392450&width=480)
![[Pre-owned] PT900 Star Ruby Ring SR3.57ct D1.40ct 8.8g #11.5](http://koufuku.jp/cdn/shop/files/2000000070353_2.jpg?v=1752392450&width=480)
![[Pre-owned] PT900 Diamond V-line Ring 1.00ct 6.3g #15](http://koufuku.jp/cdn/shop/files/2000000087184_2.jpg?v=1752392450&width=480)
![[Pre-owned] K18YG MEXICO OPAL Ring OP5.00ct D0.14ct 6.0g #16](http://koufuku.jp/cdn/shop/files/2000000069586_2.jpg?v=1752392450&width=480)
![[Pre-owned] K18YG Diamond Ring 0.45ct D0.59ct 7.4g #15](http://koufuku.jp/cdn/shop/files/2000000070988_2.jpg?v=1752392450&width=480)
![[Pre-owned] PT900 DIAMOND Princess Cut Diamond Ring D1.30ct 6.2g #10](http://koufuku.jp/cdn/shop/files/2000000085920_2.jpg?v=1752392450&width=480)
![[Pre-owned] K18WG Chalcedony Ruby & Chalcedony Ring R0.17ct C23.65ct D0.28ct 15.3g #11.5](http://koufuku.jp/cdn/shop/files/2000000076720_2.jpg?v=1752392450&width=480)
![[Pre-owned] PT900 Star Sapphire Ring 12.85ct D0.50ct 14.1g #12](http://koufuku.jp/cdn/shop/files/2000000087498_2.jpg?v=1752392450&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] PT900 Black Opal Ring BO2.81ct D1.30ct 13.2g #12](http://koufuku.jp/cdn/shop/files/2000000087481_2.jpg?v=1752392450&width=480)
![[Pre-owned] PT900 JADEITE Ring 2.15ct D0.40ct CGL Certified 7.2g #12](http://koufuku.jp/cdn/shop/files/2000000087849_3.jpg?v=1752392450&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)