Gems, Jewelry and Precious Metals
Showing 1386 products
![[Pre-owned] 18K Yellow Gold Ruby and Diamond Ring, R2.75ct, D0.75ct, 10.0g, #11.5](http://koufuku.jp/cdn/shop/files/DSC_2014.jpg?v=1761632530&width=480)
![[Pre-owned] 18K Yellow Gold Ruby Ring, R0.91ct, D1.22ct, 8.1g, #11](http://koufuku.jp/cdn/shop/files/2000000068671_2.jpg?v=1759988719&width=480)
![[Used] PT900 SAPPHIRE Ring, S1.41ct, D0.32ct, 6.2g, #12](http://koufuku.jp/cdn/shop/files/2000000089263_2.jpg?v=1759988718&width=480)
![[Pre-owned] 18K Yellow Gold Sapphire Ring, S1.10ct, D0.13ct, 4.5g, #12.5](http://koufuku.jp/cdn/shop/files/2000000106595_2.jpg?v=1759988718&width=480)
![[Pre-owned] 18K Yellow Gold 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 Sapphire Ring, S1.09ct, D0.75ct, 6.9g, #14](http://koufuku.jp/cdn/shop/files/2000000011301_2.jpg?v=1759988718&width=480)
![[Pre-owned] 18K Yellow Gold Ruby Ring, R 0.58ct, D 0.62ct, 7.0g, #12.5](http://koufuku.jp/cdn/shop/files/2000000087900_2.jpg?v=1759988719&width=480)
![[Used] PT900 SAPPHIRE Unheated Sapphire Ring, S1.118ct, D0.41ct, Nihon Hokyo, 6.0g, #17](http://koufuku.jp/cdn/shop/files/2000000024363_3.jpg?v=1759988718&width=480)
![[Used] PT900 SAPPHIRE Sapphire Ring 2.02ct D0.12ct 4.1g #11.5](http://koufuku.jp/cdn/shop/files/2000000017136_2.jpg?v=1759988718&width=480)
![[Used] 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] 18K Yellow Gold Ruby Ring, R 0.44ct, D 0.11ct, 4.4g, #11](http://koufuku.jp/cdn/shop/files/2000000009667_2.jpg?v=1759988719&width=480)
![[Used] PT900 Diamond and Sapphire Ring, D0.26ct, S0.55ct, 3.9g, #11](http://koufuku.jp/cdn/shop/files/2000000011387_2.jpg?v=1759988718&width=480)
![[Pre-owned] 18K Yellow Gold 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 Ruby Ring 0.80ct D0.72ct 7.3g #16](http://koufuku.jp/cdn/shop/files/2000000073026_2.jpg?v=1759988719&width=480)
![[Used] 18K Yellow Gold RUBY Ruby Ring R1.46ct D0.52ct 4.7g 12](http://koufuku.jp/cdn/shop/files/2000000044040_2.jpg?v=1759988719&width=480)
![[Used] PT900 SAPPHIRE Ring, S2.51ct, D1.00, Nihon Hokyo So, 11.4g, #12](http://koufuku.jp/cdn/shop/files/2000000094618_3.jpg?v=1759988719&width=480)
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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.
![[Pre-owned] 18K Yellow Gold Ruby Ring, R 0.69ct, D 0.73ct, 6.5g, #11](http://koufuku.jp/cdn/shop/files/2000000052540_2.jpg?v=1759988719&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)
