Gems, Jewelry, and Precious Metals
Showing 1929 products
![[Pre-owned] PT900/K18YG Myanmar Ruby Ring, R1.58ct D0.54ct, with NGL Appraisal, 14.2g, Size #12](http://koufuku.jp/cdn/shop/files/2000000068435_3.jpg?v=1765877331&width=480)
![[Pre-owned] K18/PT900 Diamond Ring 0.35ct 3.1g #11](http://koufuku.jp/cdn/shop/files/2000000093017_2.jpg?v=1765877331&width=480)
![[Pre-owned] PT900 SAPPHIRE Sapphire Ring S1.57ct D0.15ct 6.6g #10](http://koufuku.jp/cdn/shop/files/2000000026497_2.jpg?v=1765877331&width=480)
![[Pre-owned] PT950 Diamond Ring 0.30ct D Color IF Clarity 3Excellent, with 0.24ct side diamonds, 3.0g, Size 4](http://koufuku.jp/cdn/shop/files/2000000033488_2.jpg?v=1765877331&width=480)
![[Pre-owned] K18YG Sapphire Ring S0.89ct D1.18ct with Sorting, 5.8g, #13](http://koufuku.jp/cdn/shop/files/2000000117089_3.jpg?v=1765877331&width=480)
![[Pre-owned] K18WG EMERALD RING E1.83ct D0.52ct 3.7g #14](http://koufuku.jp/cdn/shop/files/DSC_2008_488b48d0-0624-4a80-85b2-f5970e332319.jpg?v=1775188643&width=480)
![[Pre-owned] K18YG AKOYA PEARL Ring 9.6mm 4.3g #13.5](http://koufuku.jp/cdn/shop/files/2000000099330_2.jpg?v=1765877331&width=480)
![[Pre-owned] PT900 EMERALD RING E1.51ct D0.69ct 9.7g #12](http://koufuku.jp/cdn/shop/files/2000000094601_2_2.jpg?v=1766993836&width=480)
![[Pre-owned] PT900 Diamond 0.355ct, E Color, VS1, Excellent Cut, VSB, CGL Certificate, 3.5g, Size #9](http://koufuku.jp/cdn/shop/files/2000000099217_3.jpg?v=1765877331&width=480)
![[Pre-owned] PT900 MEXICO OPAL Ring, D0.20ct, 8.3g, #9](http://koufuku.jp/cdn/shop/files/2000000102085_2.jpg?v=1765877331&width=480)
![[Pre-owned] PT900 DIAMOND Ring D0.15ct 4.5g #8](http://koufuku.jp/cdn/shop/files/2000000033600_2.jpg?v=1765877331&width=480)
![[Pre-owned] K18WG Golden Pearl Ring 11.5mm D0.95ct S0.08ct 8.0g #12](http://koufuku.jp/cdn/shop/files/2000000044477_2.jpg?v=1765877331&width=480)
![[Pre-owned] K18YG Mabe Pearl Ring, 13.5mm, 4.1g, Size 10.5](http://koufuku.jp/cdn/shop/files/2000000048017_2.jpg?v=1765877332&width=480)
![[Pre-owned] K18WG Diamond Ring D0.45ct 5.4g #12](http://koufuku.jp/cdn/shop/files/2000000053318_2.jpg?v=1765877332&width=480)
![[Pre-owned] K18WG Sapphire Ring S0.87ct D0.04ct 1.6g #11.5](http://koufuku.jp/cdn/shop/files/2000000036427_2.jpg?v=1765877331&width=480)
![[Pre-owned] PT900 RUBELLITE TOURMALINE Ring (Red Tourmaline) T1.64ct D0.06ct, with Nippon Jewelry Association Sorting, 8.4g, Size #15.5](http://koufuku.jp/cdn/shop/files/2000000022314_3.jpg?v=1765877332&width=480)
![[Pre-owned] PT900 Imperial Topaz Ring T1.57ct D0.19ct with CGL Sorting, 6.8g, Size 17](http://koufuku.jp/cdn/shop/files/2000000007878_3.jpg?v=1765877331&width=480)
![[Pre-owned] PT900 MEXICO OPAL Ring 4.45ct 6.7g #11](http://koufuku.jp/cdn/shop/files/2000000005591_2.jpg?v=1765877332&width=480)
![[Pre-owned] PT900 Jadeite Ring J2.16ct D0.43ct with Sorting, 5.7g, Size 10](http://koufuku.jp/cdn/shop/files/2000000021867_3.jpg?v=1765877331&width=480)
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![[Pre-owned] K18WG Diamond Ring, 0.493ct H Color SI2, D0.20ct, with GGL Sorting, 3.2g, Size #11.5](http://koufuku.jp/cdn/shop/files/2000000039824_3.jpg?v=1765877332&width=480)
![[Pre-owned] PT900 BLACK OPAL RING BO7.48ct D0.70ct with Appraisal Report, 9.4g, Size 12](http://koufuku.jp/cdn/shop/files/2000000064062_3.jpg?v=1765877332&width=480)
![[Pre-owned] K18WG Diamond Ring D0.46ct 5.7g #14](http://koufuku.jp/cdn/shop/files/2000000053493_2.jpg?v=1765877332&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 Burmese Ruby Ring, R1.42ct, D1.48ct, "Pigeon Blood," with AIGS certificate, 6.6g, Size 14](http://koufuku.jp/cdn/shop/files/2000000068992_4.jpg?v=1765877332&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)