Gems, Jewelry, and Precious Metals
Showing 1929 products
![[Pre-owned] PT900 SAPPHIRE Ring, S1.02ct D0.10ct, with GRJ Grading Report, 5.8g, Size 9](http://koufuku.jp/cdn/shop/files/2000000124995_3.jpg?v=1766801414&width=480)
![[Pre-owned] K18WG Star Sapphire Ring SS7.71ct D0.36ct 6.2g #12.5](http://koufuku.jp/cdn/shop/files/2000000050348_2.jpg?v=1766801414&width=480)
![[Pre-owned] PT900 EMERALD RING E0.96ct D0.75ct D0.38ct 7.8g #13 Hand Made](http://koufuku.jp/cdn/shop/files/2000000127019_2.jpg?v=1766801414&width=480)
![[Used] K18YG DIAMOND RING 0.339ct D Color VS1 Class Very Good Cut CGL Sorting 2.2g #12](http://koufuku.jp/cdn/shop/files/2000000027494_2.jpg?v=1766801414&width=480)
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![[Pre-owned] K18YG Emerald Ring E0.25ct D0.81ct 7.2g #12](http://koufuku.jp/cdn/shop/files/2000000116471_2.jpg?v=1766801414&width=480)
![[Pre-owned] PT900 SPINEL Ring S4.46ct D0.31ct 8.9g #17.5](http://koufuku.jp/cdn/shop/files/2000000016474_2.jpg?v=1766801414&width=480)
![[Pre-owned] K18WG/K18PG Pink & Colorless Diamond Ring PD0.07ct D0.51ct 8.9g #15.5](http://koufuku.jp/cdn/shop/files/2000000038018_2.jpg?v=1766801414&width=480)
![[Pre-owned] PT900/K18YG Onyx Ring D0.44 with Appraisal Report, 13.8g, Size 12](http://koufuku.jp/cdn/shop/files/2000000025896_3.jpg?v=1766801414&width=480)
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![[Pre-owned] PT900 SAPPHIRE Ring S1.59ct D0.80ct 8.1g #15](http://koufuku.jp/cdn/shop/files/2000000092454_2.jpg?v=1766802912&width=480)
![[Pre-owned] K18YG SAPPHIRE Sapphire Ring S0.52ct S0.50ct D0.77ct 5.2g #15.5](http://koufuku.jp/cdn/shop/files/2000000095028_2.jpg?v=1766802912&width=480)
![[Pre-owned] K18YG SAPPHIRE DIAMOND RING 4.5g #14](http://koufuku.jp/cdn/shop/files/2000000056623_2.jpg?v=1766804172&width=480)
![[Pre-owned] K18WG Tanzanite Ring, Appraisal Report included, 10.2g, Size #11.5](http://koufuku.jp/cdn/shop/files/2000000039763_3.jpg?v=1766824686&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)
![[Pre-owned] PT900 EMERALD RING E1.40ct D0.78ct 8.4g #10](http://koufuku.jp/cdn/shop/files/2000000029627_2.jpg?v=1766824686&width=480)
![[Pre-owned] PT900/K18YG EMERALD RING E1.97ct D0.17ct 9.8g #16](http://koufuku.jp/cdn/shop/files/2000000037479_2.jpg?v=1766824686&width=480)
![[Pre-owned] K18YG EMERALD RING E0.96ct D0.64ct 7.0g #15](http://koufuku.jp/cdn/shop/files/2000000117379_2.jpg?v=1766824686&width=480)
![[Pre-owned] Jewelry Maki K18YG SAPPHIRE RING S1.34ct D0.32ct 5.7g #11 ONE PRICE](http://koufuku.jp/cdn/shop/files/2000000015934_2.jpg?v=1766826161&width=480)
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![[Pre-owned] PT900 EMERALD RING E3.648ct D3.53ct 12g #11](http://koufuku.jp/cdn/shop/files/2000000019819_2.jpg?v=1766992785&width=480)
![[Pre-owned] K18/PT900 EMERALD RING E0.32ct D0.12ct with Sorting, 4.8g, Size 11](http://koufuku.jp/cdn/shop/files/2000000007748_3.jpg?v=1766992784&width=480)
![[Pre-owned] PT900 EMERALD RING E0.53ct D0.47ct 5.9g #12](http://koufuku.jp/cdn/shop/files/2000000117287_2.jpg?v=1766992784&width=480)
![[Pre-owned] PT900 EMERALD RING E5.89ct D2.37ct 19.8g #15](http://koufuku.jp/cdn/shop/files/2000000020754_2.jpg?v=1766992784&width=480)
![[Pre-owned] K18WG Emerald Ring, with CGL grading report, 19.1g, size 9.5](http://koufuku.jp/cdn/shop/files/2000000072944_3.jpg?v=1766992784&width=480)
![[Pre-owned] PT900 EMERALD RING E1.203ct D0.35ct 4.8g #12](http://koufuku.jp/cdn/shop/files/2000000014760_2.jpg?v=1766992784&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] PT900 EMERALD RING E0.90ct D0.46ct 6.2g #13](http://koufuku.jp/cdn/shop/files/2000000125671_2.jpg?v=1766992784&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)