Showing 131 products
![[Used] PT900 Emerald Ring, E0.91ct, D0.52ct, 8.1g, #13](http://koufuku.jp/cdn/shop/files/2000000022383_2.jpg?v=1750401687&width=480)
![[Pre-owned] K18WG OPAL Black Opal Ring, BO 1.32ct, D 0.13ct, 2.5g, #13](http://koufuku.jp/cdn/shop/files/2000000036816_2.jpg?v=1750401687&width=480)
![[Pre-owned] K18WG BLACK OPAL Black Opal Ring, BO 2.46ct, D 0.35ct, 4.1g, #13](http://koufuku.jp/cdn/shop/files/2000000039435_2.jpg?v=1750401687&width=480)
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![[Used] PT900 Emerald Ring, E0.45ct, D0.70ct, 7.8g, #13](http://koufuku.jp/cdn/shop/files/2000000005171_2.jpg?v=1750401687&width=480)
![[Used] K18PG DIAMOND Ring D1.07ct 4.2g #11.5](http://koufuku.jp/cdn/shop/files/2000000039602_2.jpg?v=1750401687&width=480)
![[Pre-owned] K18WG Emerald Ring E0.886ct D0.58ct 4.0g #12.5](http://koufuku.jp/cdn/shop/files/2000000042855_2.jpg?v=1750401688&width=480)
![[Used] K18YG RUBY Ruby Ring R1.39ct D0.50ct 5.6g #11](http://koufuku.jp/cdn/shop/files/2000000077437_2.jpg?v=1746252099&width=480)
![[Pre-owned] K18YG RUBELLITE TOURMALINE RING, 1.69ct, D0.02ct, 5.2g, #12](http://koufuku.jp/cdn/shop/files/2000000069968_9.jpg?v=1746249882&width=480)
![[Used] PT900 SPINEL Red Spinel Ring RS2.75ct D0.63ct Central Gem Laboratory Identification 7.7g #12](http://koufuku.jp/cdn/shop/files/2000000069876_3.jpg?v=1746249870&width=480)
![[Used] PT900 RUBY Burmese ruby ring R1.54ct D0.71ct #12 GRS certificate included](http://koufuku.jp/cdn/shop/files/2000000082493_3.jpg?v=1746247300&width=480)
![[Used] PT900 AKOYA PEARL Akoya pearl ring 8.6mm D0.17ct 5.8g #9.5](http://koufuku.jp/cdn/shop/files/2000000014357_2.jpg?v=1746180305&width=480)
![[Used] GUCCI Ring K18WG Icon 3.6g #12.5](http://koufuku.jp/cdn/shop/files/2000000080147_2.jpg?v=1746173213&width=480)
![[Used] K18WG OPAL Opal Ring 1.06ct 0.08ct 2.1g #13.5](http://koufuku.jp/cdn/shop/files/2000000045535_2.jpg?v=1746161481&width=480)
![[Used] PT900 RUBY Ruby Ring R0.54ct D0.35ct Certificate included 4.9g #6.5](http://koufuku.jp/cdn/shop/files/2000000070537_3.jpg?v=1745909411&width=480)
![[Used] K18YG Ruby Ring R0.55ct D0.52ct 5.4g #13](http://koufuku.jp/cdn/shop/files/2000000071374_2.jpg?v=1745908638&width=480)
![[Used] PT900 Diamond Ring 0.613ct F SI2 Good Central Gem Laboratory Sorting 4.5g #11](http://koufuku.jp/cdn/shop/files/2000000012544_3.jpg?v=1750143322&width=480)
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![[Used] K18YG Garnet Ring G11.42ct D0.72ct with Gem Research Japan Sorting 14.6g #14](http://koufuku.jp/cdn/shop/files/2000000073583_2.jpg?v=1745901557&width=480)
![[Used] LUCIE K18PG Diamond Ring D0.255ct 1.5g #5.5](http://koufuku.jp/cdn/shop/files/2000000014401_2.jpg?v=1745899505&width=480)
![[Used] TIFFANY & Co. Tiffany K18YG T1 Narrow Ring 4g #9](http://koufuku.jp/cdn/shop/files/2000000014746_2.jpg?v=1745893399&width=480)
![[Used] CARTIER K18WG/ceramic Mylon Panthere diamond ring 11.9g #13.5](http://koufuku.jp/cdn/shop/files/2000000088259_2.jpg?v=1745125488&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] MIKIMOTO PT900 DIAMOND Diamond Ring 1.467ct E VS1 d0.38ct 6.1g #12](http://koufuku.jp/cdn/shop/files/2000000069425_3.jpg?v=1752738489&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)
