Gems, Jewelry and Precious Metals
Showing 1386 products
![[Pre-owned] PT900/K18YG ONYX Ring, D0.44, Certificate of Authenticity, 13.8g, #12](http://koufuku.jp/cdn/shop/files/2000000025896_3.jpg?v=1766801414&width=480)
![[Pre-owned] K18YG DIAMOND RING 3.337ct D2.10ct 10.3g #18](http://koufuku.jp/cdn/shop/files/2000000116815_2.jpg?v=1766802912&width=480)
![[Used] 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 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 Sapphire and Diamond Ring 4.5g #14](http://koufuku.jp/cdn/shop/files/2000000056623_2.jpg?v=1766804172&width=480)
![[Pre-owned] K18WG Tanzanite Ring with Certificate of Authenticity 10.2g #11.5](http://koufuku.jp/cdn/shop/files/2000000039763_3.jpg?v=1766824686&width=480)
![[Pre-owned] 18K Yellow Gold Quartz Citrine & Smoky Quartz Pendant Necklace 3.9g](http://koufuku.jp/cdn/shop/files/2000000100265_2.jpg?v=1766824685&width=480)
![[Used] PT900 Emerald Ring, Emerald 1.40ct, D0.78ct, 8.4g, #10](http://koufuku.jp/cdn/shop/files/2000000029627_2.jpg?v=1766824686&width=480)
![[Pre-owned] PT900/K18YG Emerald Ring Emerald 1.97ct D0.17ct 9.8g #16](http://koufuku.jp/cdn/shop/files/2000000037479_2.jpg?v=1766824686&width=480)
![[Used] K18YG Emerald Ring Emerald 0.96ct 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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![[Used] PT900 Emerald Ring Emerald 3.648ct D3.53ct 12g #11](http://koufuku.jp/cdn/shop/files/2000000019819_2.jpg?v=1766992785&width=480)
![[Pre-owned] K18/PT900 Emerald Ring, Emerald 0.32ct, D0.12ct, with sorting, 4.8g, #11](http://koufuku.jp/cdn/shop/files/2000000007748_3.jpg?v=1766992784&width=480)
![[Used] PT900 Emerald Ring Emerald 0.53ct D0.47ct 5.9g #12](http://koufuku.jp/cdn/shop/files/2000000117287_2.jpg?v=1766992784&width=480)
![[Used] PT900 Emerald Ring Emerald 5.89ct 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 sorting, 19.1g, #9.5](http://koufuku.jp/cdn/shop/files/2000000072944_3.jpg?v=1766992784&width=480)
![[Used] PT900 Emerald Ring Emerald 1.203ct D0.35ct 4.8g #12](http://koufuku.jp/cdn/shop/files/2000000014760_2.jpg?v=1766992784&width=480)
![[Used] PT900 Emerald Ring E0.90ct D0.46ct 6.2g #13](http://koufuku.jp/cdn/shop/files/2000000125671_2.jpg?v=1766992784&width=480)
KOUFUKU is an e-commerce site that handles a wide range of products, from jewelry and precious metals to brand bags, brand watches, brand apparel, and tableware. In addition to sales, we also offer a purchase service.
![[Used] PT900 Emerald Ring Emerald 2.30ct D1.95ct 12.8g #12.5](http://koufuku.jp/cdn/shop/files/2000000019796_2.jpg?v=1766992784&width=480)
![[Used] PT900 Emerald Ring, E2.07ct, D2.06ct, GRS Certificate, 8.3g, #12](http://koufuku.jp/cdn/shop/files/2000000090412_3.jpg?v=1766992784&width=480)
![[Pre-owned] K18WG DIAMOND Necklace Diamond Pendant Necklace D0.97ct 3.9g](http://koufuku.jp/cdn/shop/files/2000000115832_2.jpg?v=1766992797&width=480)
![[Used] PT900 SAPPHIRE RING Sapphire Ring S2.57ct D1.51ct 14.3g #15](http://koufuku.jp/cdn/shop/files/2000000071954_2.jpg?v=1768882396&width=480)
![[Pre-owned] MIKIMOTO PT950 ALEXANDRITE RING, A 0.42ct, D 0.62ct, 6.1g, #15, ONE PRICE](http://koufuku.jp/cdn/shop/files/2000000123844_3.jpg?v=1768882396&width=480)
