Showing 1787 products
![[Pre-owned] K18YG Boulder Opal Ring, BO 4.18ct, D 0.11ct, 11.4g, Size 12](http://koufuku.jp/cdn/shop/files/2000000105925_2.jpg?v=1765161864&width=480)
![[Pre-owned] K18YG ORANGE SAPPHIRE Ring S0.83ct D0.26ct CGL Cert 5.9g #9.5](http://koufuku.jp/cdn/shop/files/2000000088037_3.jpg?v=1760609369&width=480)
![[Pre-owned] K18YG PARAIBA TOURMALINE RING, PT2.614ct, D1.49ct, with sorting, 8.3g, size 12](http://koufuku.jp/cdn/shop/files/2000000126005_3.jpg?v=1771658188&width=480)
![[Pre-owned] K18YG PEARL EARRING / Combined Pierced Earrings, White South Sea Pearl P12.4mm D4.05ct, Aurora Venus, 25.0g, with Pearl Science Laboratory (PSL) Certificate](http://koufuku.jp/cdn/shop/files/2000000083261_3.jpg?v=1771480013&width=480)
![[Pre-owned] K18YG PEARL NECKLACE D0.34ct 14.5g](http://koufuku.jp/cdn/shop/files/2000000115740_2.jpg?v=1771658188&width=480)
![[Pre-owned] K18YG Pearl Ring, 9.2mm Pearl, 1.13ct Diamond, 10.8g, Size 16](http://koufuku.jp/cdn/shop/files/2000000031095_2.jpg?v=1768806608&width=480)
![[Pre-owned] K18YG PEARL RING South Sea Pearl Ring P10.9mm D 0.63ct 7.6g #8.5](http://koufuku.jp/cdn/shop/files/2000000040226_2.jpg?v=1771658186&width=480)
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![[Pre-owned] K18YG South Sea White Pearl Ring, P12.2mm, D1.80ct, 11.3g, Size 7](http://koufuku.jp/cdn/shop/files/2000000044002_2.jpg?v=1768882396&width=480)
![[Pre-owned] K18YG PEARL Ring 10.6mm D0.40ct 8.4g #11.5](http://koufuku.jp/cdn/shop/files/2000000043548_2.jpg?v=1766219023&width=480)
![[Pre-owned] K18YG Peridot Ring D0.22ct 7.4g #12.5](http://koufuku.jp/cdn/shop/files/2000000125060_2.jpg?v=1771053915&width=480)
![[Pre-owned] K18YG PERIDOT RING P2.00ct 4.3g #16.5](http://koufuku.jp/cdn/shop/files/2000000081427_2.jpg?v=1771665040&width=480)
![[Used] K18YG PINK SAPPHIRE RING PS1.10ct D1.64ct 7.3g #12](http://koufuku.jp/cdn/shop/files/2000000042503_2.jpg?v=1762397786&width=480)
![[Pre-owned] K18YG Pink Sapphire Ring PS1.25ct D1.12ct with GRJ Sorting, 6.7g, #13](http://koufuku.jp/cdn/shop/files/2000000089270_3.jpg?v=1751698229&width=480)
![[Pre-owned] K18YG Burmese Unheated Pink Sapphire Ring, PS2.68ct E0.35ct D0.63ct, with GIA Report, 8.0g, Size 12.5](http://koufuku.jp/cdn/shop/files/2000000041728_4.jpg?v=1766219023&width=480)
![[Pre-owned] K18YG Pink Sapphire Ring, PS2.12ct D1.20ct, 6.9g, Size 11.5](http://koufuku.jp/cdn/shop/files/DSC_2017.jpg?v=1761632587&width=480)
![[Pre-owned] K18YG Pink Tourmaline Ring T0.67ct D0.14ct 3.1g #5](http://koufuku.jp/cdn/shop/files/2000000080543_2.jpg?v=1752392449&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 PURPLE SAPPHIRE RING PS1.56ct PS0.10ct D0.70ct with CGL Sorting, 7.2g, Size 15](http://koufuku.jp/cdn/shop/files/2000000075549_3.jpg?v=1768444653&width=480)
![[Pre-owned] K18YG Quartz Citrine & Smoky Quartz Pendant Necklace 3.9g](http://koufuku.jp/cdn/shop/files/2000000100265_2.jpg?v=1766824685&width=480)
![[Used] K18YG QUARTZITE RING, Size 14, 4g](http://koufuku.jp/cdn/shop/files/2000000121260_2.jpg?v=1768882395&width=480)
![[Pre-owned] K18YG RUBY EARRINGS Ruby/White Sapphire Earrings R0.96ct WS0.54ct 3.7g](http://koufuku.jp/cdn/shop/files/2000000044934_2.jpg?v=1792041006&width=480)
![[Pre-owned] K18YG RUBY PENDANT TOP R3.21ct D0.09ct 5.3g](http://koufuku.jp/cdn/shop/files/2000000146324_2.jpg?v=1787905452&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)