Gems, Jewelry, and Precious Metals
Showing 1929 products
![[Pre-owned] K18YG Ruby Ring R0.68ct D0.37ct 7.4g #12](http://koufuku.jp/cdn/shop/files/2000000108919_2.jpg?v=1762397786&width=480)
![[Pre-owned] K18YG Sapphire Ring 1.00ct D0.11ct 5.8g #12](http://koufuku.jp/cdn/shop/files/2000000108933_2.jpg?v=1762397786&width=480)
![[Pre-owned] PT900 Mozambican Unheated Ruby Ring 2.00ct, with GRS Certificate, 4.9g, Size 11.5](http://koufuku.jp/cdn/shop/files/2000000115788_3.jpg?v=1762397786&width=480)
![[Pre-owned] 18KWG Mexico Opal Ring, Handmade, 8.0g, Size 9](http://koufuku.jp/cdn/shop/files/2000000056975_2.jpg?v=1762397786&width=480)
![[Pre-owned] K18YG AKOYA PEARL Ring P7.0mm D0.25ct 5.0g #10.5](http://koufuku.jp/cdn/shop/files/2000000106236_2.jpg?v=1762397786&width=480)
![[Pre-owned] PT850/PT900 Diamond Pendant Necklace, 0.519ct, D0.094ct, 7.5g](http://koufuku.jp/cdn/shop/files/2000000018492_2.jpg?v=1763175991&width=480)
![[Pre-owned] PT950 Pink Sapphire Ring PS3.83ct D0.80ct With Sorting 5.4g #12](http://koufuku.jp/cdn/shop/files/2000000001265_3.jpg?v=1763175991&width=480)
![[Pre-owned] K18WG Multi-Gem Ruby/Sapphire Pendant Necklace D0.45ct 6.5g](http://koufuku.jp/cdn/shop/files/2000000002705_3.jpg?v=1763176127&width=480)
![[Pre-owned] PT900 Black Opal Ring, BO3.29ct D0.67ct, CGL Sorting included, 8.7g, Size 13.5](http://koufuku.jp/cdn/shop/files/2000000014845_3.jpg?v=1763175990&width=480)
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![[Pre-owned] K18YG OPAL Pendant Necklace D0.30ct 12.9g](http://koufuku.jp/cdn/shop/files/2000000077093_3.jpg?v=1763176155&width=480)
![[Pre-owned] PT900 Black Opal Ring, BO5.43ct D1.17ct, 10.4g, Size 14.5](http://koufuku.jp/cdn/shop/files/2000000019758_2.jpg?v=1763175991&width=480)
![[Pre-owned] PT900 Diamond Ring D0.31ct 5.3g #12](http://koufuku.jp/cdn/shop/files/2000000009438_2.jpg?v=1763175991&width=480)
![[Pre-owned] PT900 DIAMOND Ring 3.019ct D0.45ct 6.5g #9](http://koufuku.jp/cdn/shop/files/DSC_2014_994554b8-725c-4e59-811f-f3f8329adec4.jpg?v=1775188842&width=480)
![[Pre-owned] PT900 Diamond Ring 0.71ct, with Ginza Wako certificate, 4.1g, size 7](http://koufuku.jp/cdn/shop/files/2000000112923_3.jpg?v=1763175990&width=480)
![[Pre-owned] PT950 Black Opal Ring, BO3.08ct D1.47ct, 7.8g, Size 11.5](http://koufuku.jp/cdn/shop/files/2000000006574_2.jpg?v=1763175991&width=480)
![[Pre-owned] PT900 Sapphire Ring, S1.54ct, D0.677ct, with GRJ Grading Report, 10.7g, Size 15](http://koufuku.jp/cdn/shop/files/2000000018546_3.jpg?v=1763175990&width=480)
![[Pre-owned] PT900 Jadeite Pendant Necklace D1.70ct 14.0g](http://koufuku.jp/cdn/shop/files/2000000057798_3.jpg?v=1763176295&width=480)
![[Pre-owned] PT900 Unheated Sapphire Ring S4.18ct D0.60ct with Sorting, 6.2g, Size 13](http://koufuku.jp/cdn/shop/files/2000000019468_3.jpg?v=1763175991&width=480)
![[Pre-owned] PT900 Black Opal Ring, BO1.61ct, D1.44ct, with Sorting, 12.1g, Size 12](http://koufuku.jp/cdn/shop/files/2000000019833_3.jpg?v=1763175991&width=480)
![[Pre-owned] PT900 BLACK OPAL Ring BO4.65ct D0.34ct 11.6g #15](http://koufuku.jp/cdn/shop/files/2000000043142_2.jpg?v=1763175991&width=480)
![[Pre-owned] PT900 Black Opal Ring, BO 0.70ct, D 0.25ct, 5.1g, Size 14](http://koufuku.jp/cdn/shop/files/2000000068565_2.jpg?v=1763175991&width=480)
![[Pre-owned] PT900 BLACK OPAL Ring BO6.70ct D0.185ct 7.2g #13](http://koufuku.jp/cdn/shop/files/2000000093949_2.jpg?v=1763175991&width=480)
![[Used] PT900 OPAL RING Opal Ring OP1.35ct D0.12ct 5.3g #14](http://koufuku.jp/cdn/shop/files/2000000082837_2.jpg?v=1763175991&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)