Showing 1787 products
![[Pre-owned] K18WG SAPPHIRE RING Sri Lankan Sapphire Ring S3.19ct D0.28ct Royal Blue with AIGS Certificate 8.3g #13](http://koufuku.jp/cdn/shop/files/2000000044514_4.jpg?v=1768808621&width=480)
![[Pre-owned] K18WG Sapphire Ring, Sri Lankan Sapphire 4.08ct, Diamond 0.96ct, with GRS Certificate, 7.2g, Size 14](http://koufuku.jp/cdn/shop/files/2000000048406_3.jpg?v=1768444692&width=480)
![[Pre-owned] K18WG SAPPHIRE RING Sri Lankan Sapphire Ring S7.82ct D0.59ct with GRS Certificate, 6.6g, Size #12.5](http://koufuku.jp/cdn/shop/files/2000000043258_4.jpg?v=1768444693&width=480)
![[Used] K18WG SAPPHIRE RING Sri Lankan Sapphire Ring S10.72ct D1.44ct GRS Certification 9.3 #13g](http://koufuku.jp/cdn/shop/files/2000000095202_3.jpg?v=1782449903&width=480)
![[Pre-owned] K18WG Sapphire Ring, Sri Lankan Unheated Sapphire, S6.15ct, D1.18ct, GRS Certified, 6.1g, Size 14](http://koufuku.jp/cdn/shop/files/2000000035222_3.jpg?v=1765175629&width=480)
![[Pre-owned] K18WG Sapphire Ring, Sri Lankan Unheated Sapphire S7.57ct D1.32ct, GRS Certified, 9.7g, Size 13](http://koufuku.jp/cdn/shop/files/2000000034300_4.jpg?v=1768444714&width=480)
![[Used] K18WG SAPPHIRE RING Fancy Color Sapphire Ring S3.79ct D0.304ct 7.4g #12 With sorting](http://koufuku.jp/cdn/shop/files/2000000042459_2.jpg?v=1750923953&width=480)
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![[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] K18WG Sapphire Ring S0.27ct D0.28ct 5.2g #14](http://koufuku.jp/cdn/shop/files/81045_01.jpg?v=1743141936&width=480)
![[Pre-owned] K18WG Sapphire Ring 2.24ct D0.82ct 4.7g #14](http://koufuku.jp/cdn/shop/files/2000000030104_2.jpg?v=1752392450&width=480)
![[Pre-owned] K18WG SAPPHIRE Sapphire Ring S0.82ct D0.24ct 3.3g #13](http://koufuku.jp/cdn/shop/files/2000000036304_2.jpg?v=1752392598&width=480)
![[Pre-owned] K18WG Sapphire Ring S0.975ct D0.45ct with Sorting Certificate, 2.5g, #13](http://koufuku.jp/cdn/shop/files/2000000089096_3.jpg?v=1760678193&width=480)
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![[Pre-owned] K18WG Sapphire Ring S1.12ct D0.10ct 3.6g #11.5](http://koufuku.jp/cdn/shop/files/2000000117515_2.jpg?v=1765175628&width=480)
![[Pre-owned] K18WG SAPPHIRE Sapphire Ring S1.25ct D1.19ct 5.5g #14](http://koufuku.jp/cdn/shop/files/2000000044194_2.jpg?v=1762391161&width=480)
![[Pre-owned] K18WG Sapphire Ring S1.43ct D0.51ct 4.2g #14](http://koufuku.jp/cdn/shop/files/2000000036373_2.jpg?v=1752392529&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)
![[Pre-owned] K18WG Sapphire Ring S1.55ct D0.47ct 3.1g #13.5](http://koufuku.jp/cdn/shop/files/2000000045269_2.jpg?v=1766219022&width=480)
![[Pre-owned] K18WG Sapphire Ring S1.88ct D0.17ct 2.8g #13.5](http://koufuku.jp/cdn/shop/files/DSC_1984_a99171a3-6588-4001-bea2-0fed1d100c7f.jpg?v=1775180133&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] K18WG Sapphire Ring, S13.31ct D0.55ct, NGL Report, 8.9g, Size 14.5](http://koufuku.jp/cdn/shop/files/2000000095868_3.jpg?v=1760667250&width=480)
![[Pre-owned] K18WG SAPPHIRE Sapphire Ring S2.022ct D0.18ct 3.6g #11.5](http://koufuku.jp/cdn/shop/files/2000000036885_2.jpg?v=1760667249&width=480)
![[Pre-owned] K18WG Sapphire Ring S2.08ct D0.98ct 4.8g #13](http://koufuku.jp/cdn/shop/files/2000000045788_2.jpg?v=1760667249&width=480)
![[Pre-owned] K18WG Sapphire Ring S3.13ct R0.03ct D0.72ct with NGL Appraisal Certificate #16](http://koufuku.jp/cdn/shop/files/2000000049748_3.jpg?v=1753249894&width=480)
![[Pre-owned] K18WG Sapphire Ring, S1.30ct, Mystery Setting, 2.9g, #16](http://koufuku.jp/cdn/shop/files/2000000031309_2.jpg?v=1750208031&width=480)
![[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)