Showing 1787 products
![[Pre-owned] K18WG Sri Lankan Unheated Sapphire Ring S4.26ct D0.37ct with AIGS Report, 4.4g, Size 13.5](http://koufuku.jp/cdn/shop/files/2000000038810_3.jpg?v=1768197670&width=480)
![[Pre-owned] K18WG Madagascar Sapphire Ring 3.13ct D0.25ct with GRS Certificate, 4.4g, Size 12.5](http://koufuku.jp/cdn/shop/files/2000000042282_3.jpg?v=1752392568&width=480)
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![[Pre-owned] K18WG Unheated Color-Change Sapphire Ring S3.94ct D0.55ct with GRS Certificate, 4.6g, Size 14](http://koufuku.jp/cdn/shop/files/2000000089034_2.jpg?v=1762391103&width=480)
![[Used] K18WG SAPPHIRE/AQUAMARINE RING S0.55ct AQ1.13ct D0.50ct 4.9g #14](http://koufuku.jp/cdn/shop/files/2000000064413_2.jpg?v=1771814676&width=480)
![[Pre-owned] K18WG Sapphire Ring S0.87ct D0.04ct 1.6g #11.5](http://koufuku.jp/cdn/shop/files/2000000036427_2.jpg?v=1765877331&width=480)
![[Pre-owned] K18WG SAPPHIRE Ring S0.95ct D0.27ct 4.4g #13.5](http://koufuku.jp/cdn/shop/files/2000000126050_2.jpg?v=1766219023&width=480)
![[Pre-owned] K18WG Sapphire Ring S1.25ct D0.29ct 5.2g #13](http://koufuku.jp/cdn/shop/files/2000000073040_2.jpg?v=1752392450&width=480)
![[Pre-owned] K18WG Sapphire Ring S2.04ct D0.55ct 4.4g #12.5](http://koufuku.jp/cdn/shop/files/2000000043722_8.jpg?v=1741937169&width=480)
![[Pre-owned] K18WG Sapphire Ring S2.09ct D0.584ct 9.0g #18](http://koufuku.jp/cdn/shop/files/2000000037899_2.jpg?v=1763176059&width=480)
![[Pre-owned] K18WG Sapphire Ring S6.93ct D0.39ct 7.3g #9](http://koufuku.jp/cdn/shop/files/2000000002941_2.jpg?v=1768197670&width=480)
![[Pre-owned] K18WG Sri Lankan Sapphire Ring, S7.24ct, D1.50ct, with GRS Certificate, 7.0g, Size 13](http://koufuku.jp/cdn/shop/files/2000000034386_3.jpg?v=1763176025&width=480)
![[Pre-owned] K18WG Sri Lankan Unheated Sapphire Ring, S11.53ct D1.78ct, with GRS Royal Blue Certificate, 10.0g, Size 13](http://koufuku.jp/cdn/shop/files/2000000070445_4.jpg?v=1762391121&width=480)
![[Pre-owned] K18WG High-quality Sri Lankan Sapphire Ring, S10.69ct D2.10ct, with GRS Certificate, 9.8g, Size 14](http://koufuku.jp/cdn/shop/files/2000000034881_3.jpg?v=1765159209&width=480)
![[Pre-owned] K18WG Unheated Sapphire Ring S1.98ct D0.40ct with GRS Certificate, 3.8g, Size 14](http://koufuku.jp/cdn/shop/files/2000000071190_4.jpg?v=1752392548&width=480)
![[Pre-owned] K18WG Shell Diamond Pendant Necklace D0.27ct 6.3g](http://koufuku.jp/cdn/shop/files/2000000038780_2.jpg?v=1765163849&width=480)
![[Pre-owned] K18WG White South Sea Pearl Ring, P12.6mm, D0.70ct, 8.3g, Size 13, includes Pearl Science Laboratory "Aurora Venus" certificate.](http://koufuku.jp/cdn/shop/files/2000000065984_2.jpg?v=1768808620&width=480)
![[Used] K18WG SOUTH SEA PEARL RING 11.2mm 9.9mm D0.08ct 9.7g #13](http://koufuku.jp/cdn/shop/files/2000000094717_2.jpg?v=1762397785&width=480)
![[Used] K18WG SOUTH SEA PEARL RING White South Sea Pearl Ring 12.5mm D1.08ct 6.6g #14.5 Pearl Science Laboratory Aurora Venus](http://koufuku.jp/cdn/shop/files/2000000065991_2.jpg?v=1779437191&width=480)
![[Pre-owned] K18WG SOUTH SEA PEARL RING White Pearl Ring P13.6mm D0.54ct 8.6g #13](http://koufuku.jp/cdn/shop/files/2000000083780_2.jpg?v=1768808619&width=480)
![[Pre-owned] K18WG South Sea Pearl Ring, P12.7mm, D1.52ct, 9.0g, Size 14, Pearl Science Laboratory (PSL) VENUS](http://koufuku.jp/cdn/shop/files/2000000083797_2.jpg?v=1768808619&width=480)
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![[Pre-owned] K18WG Pink Spinel Ring SP0.50ct D0.17ct 2.8g #13](http://koufuku.jp/cdn/shop/files/2000000115443_2.jpg?v=1762391139&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)