Gems, Jewelry and Precious Metals
Showing 1386 products
![[Pre-owned] 18K Yellow Gold Ruby Ring, 0.47ct, Diamonds, 5.6g, #13.5](http://koufuku.jp/cdn/shop/files/2000000042527_2.jpg?v=1751698229&width=480)
![[Pre-owned] 18K Yellow Gold Ruby Ring, R 0.70ct, D 0.56ct, 4.7g, #11](http://koufuku.jp/cdn/shop/files/2000000043562_2.jpg?v=1751698229&width=480)
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![[Used] PT900 AQUAMARINE Ring, A8.31ct, D0.47ct, 9.3g, #13](http://koufuku.jp/cdn/shop/files/2000000083001_2.jpg?v=1752392449&width=480)
![[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)
![[Used] K14WG TOURMALINE Tourmaline Ring 2.4g #16](http://koufuku.jp/cdn/shop/files/2000000078359_2.jpg?v=1752392449&width=480)
![[Pre-owned] 18K Yellow Gold Pink Tourmaline Ring, 0.67ct Tall, 0.14ct Deep, 3.1g, #5](http://koufuku.jp/cdn/shop/files/2000000080543_2.jpg?v=1752392449&width=480)
![[Used] K18YG Emerald Ring 4.5g #10](http://koufuku.jp/cdn/shop/files/2000000070919_2.jpg?v=1752392450&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] K14WG AKOYA PEARL Akoya Pearl Ring 3.5-5.0mm 3.8g #12](http://koufuku.jp/cdn/shop/files/2000000095820_2.jpg?v=1752392450&width=480)
![[Used] K18WG Emerald Ring E1.59ct 6.2g #13](http://koufuku.jp/cdn/shop/files/2000000069524_2.jpg?v=1752392450&width=480)
![[Pre-owned] PT900 Jadeite Jadeite Ring, D1.897, JGGC Mini Certificate, 14.1g, #12](http://koufuku.jp/cdn/shop/files/2000000085913_3.jpg?v=1752392449&width=480)
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![[Pre-owned] 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)
![[Used] PT900 KUNZITE Ring, K10.01ct, D0.34ct, JGGC Mini Appraisal, 10.2g, #12.5](http://koufuku.jp/cdn/shop/files/2000000085883_3.jpg?v=1752392449&width=480)
![[Pre-owned] K18WG SAPPHIRE Sapphire Ring, S1.25ct, D0.29ct, 5.2g, #13](http://koufuku.jp/cdn/shop/files/2000000073040_2.jpg?v=1752392450&width=480)
KOUFUKU is an e-commerce site that handles a wide range of products, from jewelry and precious metals to brand bags, brand watches, brand apparel, and tableware. In addition to sales, we also offer a purchase service.
![[Used] 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] 18K Yellow Gold Diamond Ring, D0.53ct, D0.24ct, 11.2g, #15.5](http://koufuku.jp/cdn/shop/files/2000000076744_2.jpg?v=1752392449&width=480)
![[Used] PT900 SAPPHIRE RING Sapphire Ring S2.57ct D1.51ct 14.3g #15](http://koufuku.jp/cdn/shop/files/2000000071954_2.jpg?v=1768882396&width=480)
![[Pre-owned] MIKIMOTO PT950 ALEXANDRITE RING, A 0.42ct, D 0.62ct, 6.1g, #15, ONE PRICE](http://koufuku.jp/cdn/shop/files/2000000123844_3.jpg?v=1768882396&width=480)
