Showing 131 products
![[Used] PT900 Emerald Ring E0.90ct D0.46ct 6.2g #13](http://koufuku.jp/cdn/shop/files/2000000125671_2.jpg?v=1766992784&width=480)
![[Used] PT900 Emerald Ring Emerald 5.89ct D2.37ct 19.8g #15](http://koufuku.jp/cdn/shop/files/2000000020754_2.jpg?v=1766992784&width=480)
![[Pre-owned] K18/PT900 Emerald Ring, Emerald 0.32ct, D0.12ct, with sorting, 4.8g, #11](http://koufuku.jp/cdn/shop/files/2000000007748_3.jpg?v=1766992784&width=480)
![[Pre-owned] PT900/K18YG Emerald Ring Emerald 1.97ct D0.17ct 9.8g #16](http://koufuku.jp/cdn/shop/files/2000000037479_2.jpg?v=1766824686&width=480)
![[Used] PT900 Emerald Ring, Emerald 1.40ct, D0.78ct, 8.4g, #10](http://koufuku.jp/cdn/shop/files/2000000029627_2.jpg?v=1766824686&width=480)
![[Pre-owned] K18WG Tanzanite Ring with Certificate of Authenticity 10.2g #11.5](http://koufuku.jp/cdn/shop/files/2000000039763_3.jpg?v=1766824686&width=480)
![[Pre-owned] K18YG SAPPHIRE DIAMOND RING Sapphire and Diamond Ring 4.5g #14](http://koufuku.jp/cdn/shop/files/2000000056623_2.jpg?v=1766804172&width=480)
![[Pre-owned] K18YG SAPPHIRE Ring, S0.52ct, S0.50ct, D0.77ct, 5.2g, #15.5](http://koufuku.jp/cdn/shop/files/2000000095028_2.jpg?v=1766802912&width=480)
![[Used] PT900 SAPPHIRE Ring, S1.59ct, D0.80ct, 8.1g, #15](http://koufuku.jp/cdn/shop/files/2000000092454_2.jpg?v=1766802912&width=480)
![[Pre-owned] PT900/K18YG ONYX Ring, D0.44, Certificate of Authenticity, 13.8g, #12](http://koufuku.jp/cdn/shop/files/2000000025896_3.jpg?v=1766801414&width=480)
![[Used] PT900 SPINEL Ring S4.46ct D0.31ct 8.9g #17.5](http://koufuku.jp/cdn/shop/files/2000000016474_2.jpg?v=1766801414&width=480)
![[Pre-owned] 18K Yellow Gold Emerald Ring, E0.25ct, D0.81ct, 7.2g, #12](http://koufuku.jp/cdn/shop/files/2000000116471_2.jpg?v=1766801414&width=480)
![[Pre-owned] PT900 SAPPHIRE Ring, S1.02ct, D0.10ct, GRJ Sorting, 5.8g, #9](http://koufuku.jp/cdn/shop/files/2000000124995_3.jpg?v=1766801414&width=480)
![[Pre-owned] K18WG STAR SAPPHIRE Star Sapphire Ring, SS7.71ct, D0.36ct, 6.2g, #12.5](http://koufuku.jp/cdn/shop/files/2000000050348_2.jpg?v=1766801414&width=480)
![[Pre-owned] PT900 SAPPHIRE Sapphire Ring, S2.564ct, D0.86ct, CGL Certificate, 15.0g, #13](http://koufuku.jp/cdn/shop/files/2000000016597_2.jpg?v=1766801414&width=480)
![[Pre-owned] 18K White Gold SAPPHIRE Color Sapphire Pendant Necklace, S10.80ct, D0.12ct, Sorting, 11.0g](http://koufuku.jp/cdn/shop/files/2000000106946_2.jpg?v=1766801414&width=480)
![[Pre-owned] K18WG BLACK OPAL Black Opal Ring, BO 1.72ct, D 0.17ct, 3.6g](http://koufuku.jp/cdn/shop/files/2000000036595_2.jpg?v=1766801414&width=480)
![[Used] PT850 Emerald Ring E0.56ct D0.58ct 4.9g #10.5](http://koufuku.jp/cdn/shop/files/2000000126081_2.jpg?v=1766801414&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] 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)
