Gems, Jewelry, and Precious Metals
Showing 1929 products
![[Pre-owned] PT900 RUBELLITE TOURMALINE Ring 3.51ct D0.21ct with NGL Appraisal, 8.0g, Size 9](http://koufuku.jp/cdn/shop/files/2000000087511_3.jpg?v=1752392450&width=480)
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![[Pre-owned] PT900 Emerald Ring E1.04ct D0.45ct 6.8g #11.5](http://koufuku.jp/cdn/shop/files/2000000087856_2.jpg?v=1752392450&width=480)
![[Pre-owned] K18WG Sapphire Ring 2.24ct D0.82ct 4.7g #14](http://koufuku.jp/cdn/shop/files/2000000030104_2.jpg?v=1752392450&width=480)
![[Pre-owned] PT900 Alexandrite Ring, A0.176ct, D0.24ct, 3.9g, Size 12](http://koufuku.jp/cdn/shop/files/2000000085999_2.jpg?v=1752392450&width=480)
![[Used] K18WG SAPPHIRE RING S1.33ct D0.97ct 3.7g #12.5](http://koufuku.jp/cdn/shop/files/2000000103624_2.jpg?v=1752392450&width=480)
![[Pre-owned] PT900 SAPPHIRE Sapphire Ring S0.45ct D0.17ct 3.8g #8.5](http://koufuku.jp/cdn/shop/files/2000000086149_2.jpg?v=1752392450&width=480)
![[Pre-owned] K18WG No-Heat Pigeon Blood Ruby Ring, 1.02ct Ruby, 0.08ct Diamond, with AIGS Certificate, 2.6g, Size 13](http://koufuku.jp/cdn/shop/files/2000000035857_4.jpg?v=1752392450&width=480)
![[Pre-owned] K18YG Sapphire Ring S0.77ct D0.64ct 5.3g #9.5](http://koufuku.jp/cdn/shop/files/2000000087832_2.jpg?v=1752392450&width=480)
![[Pre-owned] PT900 MEXICO OPAL Ring, MO2.73ct, D6p, 5.8g, #10.5](http://koufuku.jp/cdn/shop/files/2000000029689_2.jpg?v=1752392450&width=480)
![[Pre-owned] PT900/K18 Red Spinel Ring, RS 0.231ct, D 0.04ct, with NGL Certificate, 4.1g, Size 12](http://koufuku.jp/cdn/shop/files/2000000087214_3.jpg?v=1752392450&width=480)
![[Pre-owned] PT900 DIAMOND Ring D0.77ct D0.30ct 7.3g #13](http://koufuku.jp/cdn/shop/files/2000000086163_2.jpg?v=1752392450&width=480)
![[Pre-owned] K18YG Ruby Ring R0.25ct D0.07ct 2.2g #8.5](http://koufuku.jp/cdn/shop/files/2000000086033_2.jpg?v=1752392450&width=480)
![[Pre-owned] K18WG No Heat Pigeon Blood Ruby Ring, R1.01ct D0.08ct, AIGS Certified, 2.9g, Size 11.5](http://koufuku.jp/cdn/shop/files/2000000035888_3.jpg?v=1752392472&width=480)
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![[Pre-owned] K18WG No-heat Ruby Ring R0.94ct D0.32ct AIGS Pigeon Blood 2.9g #13](http://koufuku.jp/cdn/shop/files/2000000035970_3.jpg?v=1752392507&width=480)
![[Pre-owned] K18WG No-Heat Pigeon Blood Ruby Ring, R1.08ct D0.10ct, with AIGS Certificate, 1.9g, Size 13.5](http://koufuku.jp/cdn/shop/files/2000000036069_4.jpg?v=1752392507&width=480)
![[Pre-owned] PT900 SAPPHIRE RUBY Ring S0.73ct R0.40ct D0.247ct 5.5g #12](http://koufuku.jp/cdn/shop/files/2000000021980_2.jpg?v=1752392527&width=480)
![[Pre-owned] PT900 Alexandrite Ring, A1.43ct D1.20ct, with GIA Report, 5.6g, Size 12](http://koufuku.jp/cdn/shop/files/2000000017662_3.jpg?v=1752392528&width=480)
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![[Pre-owned] PT900 SAPPHIRE Ring S2.14ct D0.28ct 5.6g #15](http://koufuku.jp/cdn/shop/files/2000000016467_2.jpg?v=1752392528&width=480)
![[Pre-owned] K18/PT900 Emerald Ring E1.62ct D0.67ct 10.1g #10.5](http://koufuku.jp/cdn/shop/files/2000000005850_2.jpg?v=1752392528&width=480)
![[Pre-owned] PT900 Peridot Ring P2.31ct D0.35ct 8.5g #12.5](http://koufuku.jp/cdn/shop/files/2000000013701_2.jpg?v=1752392529&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 MEXICO OPAL Ring D1.05ct 11.7g #16](http://koufuku.jp/cdn/shop/files/2000000020433_2.jpg?v=1752392529&width=480)
![[Pre-owned] K18WG Sapphire Ring S1.43ct D0.51ct 4.2g #14](http://koufuku.jp/cdn/shop/files/2000000036373_2.jpg?v=1752392529&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)