Showing 1961 products
![[Pre-owned] PT950 Tanzanite Ring T0.64ct D0.29ct 4.4g #11.5](http://koufuku.jp/cdn/shop/files/2000000037417_2.jpg?v=1760678193&width=480)
![[Pre-owned] K18WG Sapphire Ring S1.18ct D0.58ct 3.3g #12.5](http://koufuku.jp/cdn/shop/files/2000000094342_2.jpg?v=1760678193&width=480)
![[Pre-owned] K18WG Star Sapphire Ring, SS 2.632ct, D 0.22ct, 2.7g, Size 13.5](http://koufuku.jp/cdn/shop/files/2000000050409_2.jpg?v=1760678193&width=480)
![[Pre-owned] K18WG SAPPHIRE Sapphire Ring S1.83ct D0.29ct 3.1g #12](http://koufuku.jp/cdn/shop/files/2000000036700_2.jpg?v=1760678193&width=480)
![[Pre-owned] PT900 EMERALD Ring E2.02ct D1.69ct 10g](http://koufuku.jp/cdn/shop/files/2000000011394_2.jpg?v=1760678193&width=480)
![[Used] K18WG SAPPHIRE RING Sapphire Ring CGL Sorting 3.6g #12.5](http://koufuku.jp/cdn/shop/files/2000000090146_3.jpg?v=1760678193&width=480)
![[Pre-owned] K18WG Star Sapphire Ring, SS2.067ct D0.16ct, 2.2g, Size 13.5](http://koufuku.jp/cdn/shop/files/2000000045825_2.jpg?v=1760678193&width=480)
![[Used] K18WG SAPPHIRE RING S2.45ct D0.62ct 4.7g #13.5](http://koufuku.jp/cdn/shop/files/2000000045610_2.jpg?v=1760678193&width=480)
![[Pre-owned] PT900/K18YG Garnet Ring 3.5g #7](http://koufuku.jp/cdn/shop/files/2000000037677_2.jpg?v=1760667270&width=480)
![[Pre-owned] PT950 Black Opal Ring BO1.21ct D1.11ct 8.9g #11.5](http://koufuku.jp/cdn/shop/files/2000000004471_2.jpg?v=1760667250&width=480)
![[Pre-owned] PT900 Diamond Ring 1.002ct D VS1 Excellent D0.215ct with CGL Sorting, #12, 5.6g](http://koufuku.jp/cdn/shop/files/2000000078267_3.jpg?v=1760667250&width=480)
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![[Pre-owned] K18YG GARNET Ring 1.18ct D0.03ct 4.9g #10](http://koufuku.jp/cdn/shop/files/2000000047027_2.jpg?v=1760667250&width=480)
![[Pre-owned] K18YG Unheated Purple Sapphire Ring from Madagascar, S3.93ct D1.04ct, with AIGS Certificate, 6.5g, Size #11](http://koufuku.jp/cdn/shop/files/2000000035208_3.jpg?v=1760667250&width=480)
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![[Pre-owned] K18YG RUBY & DIAMOND Ring, R0.16ct D0.50ct, 6.1g, Size 9](http://koufuku.jp/cdn/shop/files/2000000047072_2.jpg?v=1760667250&width=480)
![[Pre-owned] PT900 Green Tourmaline Ring, 8.98ct, 0.83ct Diamond, 15.4g](http://koufuku.jp/cdn/shop/files/2000000013893_2.jpg?v=1760667250&width=480)
![[Pre-owned] PT900 RUBY Ruby Ring R0.38ct D0.30ct CGL Sorting 4.6g #7](http://koufuku.jp/cdn/shop/files/2000000051512_3.jpg?v=1760667250&width=480)
![[Used] PT900 RUBY RING Invisible Setting R0.47ct D0.41ct 8.4g #12](http://koufuku.jp/cdn/shop/files/2000000075525_2.jpg?v=1760667250&width=480)
![[Pre-owned] K18WG Black Opal Ring, BO2.15ct, D0.56ct, 4.0g, Size 13](http://koufuku.jp/cdn/shop/files/2000000034553_2.jpg?v=1760667249&width=480)
![[Pre-owned] K18YG RUBY & DIAMOND Ring R1.20ct D0.23ct 4.6g #7.5](http://koufuku.jp/cdn/shop/files/2000000088013_2.jpg?v=1760667250&width=480)
![[Pre-owned] K18WG JADEITE Ring J2.051ct D0.77ct 6.4g #14](http://koufuku.jp/cdn/shop/files/2000000040776_2.jpg?v=1760667250&width=480)
![[Pre-owned] PT950 GRS Certified Unheated Burmese Ruby Ring, R1.03ct D0.59ct, 6.7g, Size 12](http://koufuku.jp/cdn/shop/files/2000000018423_3.jpg?v=1760667250&width=480)
![[Pre-owned] K18WG JADEITE Ring J4.69ct D0.88ct 6.0g #13](http://koufuku.jp/cdn/shop/files/2000000042824_2.jpg?v=1760667250&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] 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)