Gems, Jewelry and Precious Metals
Showing 1386 products
![[Used] K18WG DIAMOND Diamond Ring D0.35ct 2.0g #11](http://koufuku.jp/cdn/shop/files/2000000099309_2.jpg?v=1750923953&width=480)
![[Used] K18WG DIAMOND Ring D0.55ct 5.1g #10.5](http://koufuku.jp/cdn/shop/files/2000000047331_2.jpg?v=1750923953&width=480)
![[Pre-owned] K18WG DIAMOND Sakura Cut Diamond Ring 0.176cr D0.25ct 5.8g #12](http://koufuku.jp/cdn/shop/files/2000000090429_2.jpg?v=1750923952&width=480)
![[Pre-owned] K18WG SAPPHIRE Sapphire Ring, S1.45ct, D0.61ct, 4.3g, #13](http://koufuku.jp/cdn/shop/files/2000000094359_1.jpg?v=1750923953&width=480)
![[Used] PT900 DIAMOND Ring D1.00ct 4.9g #13](http://koufuku.jp/cdn/shop/files/2000000009629_2.jpg?v=1750923952&width=480)
![[Pre-owned] Les Essentiels K18WG Diamond Ring 3.5g #16](http://koufuku.jp/cdn/shop/files/2000000010465_2.jpg?v=1750923953&width=480)
![[Used] PT900 Diamond Ring 0.83ct D1.95ct 9.9g #11](http://koufuku.jp/cdn/shop/files/2000000025650_2.jpg?v=1750923953&width=480)
![[Pre-owned] K18WG DIAMOND Ring 0.50ct 3.3g #11.5](http://koufuku.jp/cdn/shop/files/2000000075334_3.jpg?v=1750923953&width=480)
![[Used] PT900 DIAMOND Ring D1.00ct 7.6g #12](http://koufuku.jp/cdn/shop/files/2000000009469_2.jpg?v=1750923953&width=480)
![[Used] PT900 Diamond Ring 0.652ct D0.38ct 5.7g #13](http://koufuku.jp/cdn/shop/files/2000000021676_2.jpg?v=1750923953&width=480)
![[Pre-owned] 18K White Gold Pink Sapphire Ring, PS 0.42ct, D 0.35ct, 7.5g, #12](http://koufuku.jp/cdn/shop/files/2000000043944_2.jpg?v=1750923953&width=480)
![[Used] K18WG Black Opal Ring, BO1.02ct, D0.35ct, #13.5, Certified](http://koufuku.jp/cdn/shop/files/2000000036571_3.jpg?v=1750923953&width=480)
![[Used] K18WG DIAMOND Diamond Ring D1.37ct 9.8g #5](http://koufuku.jp/cdn/shop/files/2000000039831_2.jpg?v=1750923953&width=480)
![[Used] K18WG DIAMOND Diamond Ring 0.321ct D0.16ct 4.0g #14](http://koufuku.jp/cdn/shop/files/2000000037301_2.jpg?v=1750923953&width=480)
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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] K18YG Emerald and Diamond Ring, E1.03ct, D2.45ct, 7.0g, #13](http://koufuku.jp/cdn/shop/files/2000000019895_2.jpg?v=1750923957&width=480)
![[Pre-owned] K18/PT850 RUBY Ruby Ring, R0.41ct, D0.18ct, 5.0g, #12](http://koufuku.jp/cdn/shop/files/2000000068473_2.jpg?v=1751698229&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)
