Gems, Jewelry, and Precious Metals
Showing 1929 products
![[Pre-owned] K18YG Sapphire Ring S1.13ct D0.93ct 7.3g #10.5](http://koufuku.jp/cdn/shop/files/2000000069272_2.jpg?v=1759988718&width=480)
![[Used] PT900 SAPPHIRE RING S1.09ct D0.75ct 6.9g #14](http://koufuku.jp/cdn/shop/files/2000000011301_2.jpg?v=1759988718&width=480)
![[Pre-owned] K18YG Ruby Ring R0.58ct D0.62ct 7.0g #12.5](http://koufuku.jp/cdn/shop/files/2000000087900_2.jpg?v=1759988719&width=480)
![[Pre-owned] PT900 Sapphire Ring 2.02ct D0.12ct 4.1g #11.5](http://koufuku.jp/cdn/shop/files/2000000017136_2.jpg?v=1759988718&width=480)
![[Pre-owned] PT900 Burmese Ruby Ring R1.20ct D1.24ct with GIA Report, 12.8g, Size 15](http://koufuku.jp/cdn/shop/files/2000000000404_3.jpg?v=1759988718&width=480)
![[Used] PT900 SAPPHIRE RING Sri Lankan Unheated Sapphire Ring S2.56ct D0.11ct GIA Certificate 6.4g #16](http://koufuku.jp/cdn/shop/files/2000000072050_4.jpg?v=1759988719&width=480)
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![[Pre-owned] PT900 SAPPHIRE Ring S2.76ct D0.36ct 6.8g #11.5](http://koufuku.jp/cdn/shop/files/2000000016801_2.jpg?v=1759988719&width=480)
![[Pre-owned] K18YG Sapphire Ring S0.55ct D1.25ct 7.9g #12](http://koufuku.jp/cdn/shop/files/2000000039633_2.jpg?v=1759988719&width=480)
![[Pre-owned] K18YG Ruby Ring R0.44ct D0.11ct 4.4g #11](http://koufuku.jp/cdn/shop/files/2000000009667_2.jpg?v=1759988719&width=480)
![[Pre-owned] PT900 Diamond & Sapphire Ring D0.26ct S0.55ct 3.9g #11](http://koufuku.jp/cdn/shop/files/2000000011387_2.jpg?v=1759988718&width=480)
![[Pre-owned] K18YG Ruby Ring R0.79ct D1.27ct 9.2g #14](http://koufuku.jp/cdn/shop/files/2000000002330_2.jpg?v=1759988719&width=480)
![[Pre-owned] K18YG Ruby Ring R1.46ct D0.52ct 4.7g Size 12](http://koufuku.jp/cdn/shop/files/DSC_6326.jpg?v=1775191051&width=480)
![[Pre-owned] K18YG Mozambique Ruby Ring R2.60ct D0.42ct with GIA certificate, 5.2g, size 11](http://koufuku.jp/cdn/shop/files/2000000039862_3.jpg?v=1759988719&width=480)
![[Pre-owned] PT900 Sapphire Ring, S2.51ct D1.00ct, JJA Certified, 11.4g, Size 12](http://koufuku.jp/cdn/shop/files/2000000094618_3.jpg?v=1759988719&width=480)
![[Pre-owned] K18YG Ruby Ring R0.85ct D0.065ct with NGL Appraisal, 4.9g, Size 8.5](http://koufuku.jp/cdn/shop/files/2000000038926_3.jpg?v=1759988719&width=480)
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![[Pre-owned] K18YG Ruby Ring R0.69ct D0.73ct 6.5g #11](http://koufuku.jp/cdn/shop/files/2000000052540_2.jpg?v=1759988719&width=480)
![[Pre-owned] K18YG Sapphire Ring S1.00ct D2.00ct 9.3g #14](http://koufuku.jp/cdn/shop/files/2000000070384_2.jpg?v=1759988719&width=480)
![[Pre-owned] PT900 SAPPHIRE Ring S3.115ct D0.39ct JJA Appraised 7.4g #7](http://koufuku.jp/cdn/shop/files/2000000024325_3.jpg?v=1759990497&width=480)
![[Pre-owned] PT900 Madagascar Unheated Sapphire Ring 0.97ct GRS 7.6g](http://koufuku.jp/cdn/shop/files/2000000018508_3.jpg?v=1759990497&width=480)
![[Pre-owned] PT900/K18YG Burmese Unheated Sapphire Ring, S1.232ct D0.12ct, GIA Report included, 4.8g, Size 14](http://koufuku.jp/cdn/shop/files/2000000023250_3.jpg?v=1759990497&width=480)
![[Pre-owned] PT900 SAPPHIRE Ring S1.90ct D0.57ct NGL Cert. 7.9g #11](http://koufuku.jp/cdn/shop/files/2000000015071_3.jpg?v=1759990506&width=480)
![[Pre-owned] PT900 SAPPHIRE Ring S0.54ct D0.20ct 6.6g #8](http://koufuku.jp/cdn/shop/files/2000000088921_2.jpg?v=1759990506&width=480)
![[Pre-owned] PT900 SAPPHIRE Ring S1.66ct D0.39ct 6.3g #15](http://koufuku.jp/cdn/shop/files/2000000029603_2.jpg?v=1759990506&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)