Showing 1288 products
![[Pre-owned] 18K Yellow Gold Ruby Ring, R2.10ct, D1.00ct, 9.5g, #12](http://koufuku.jp/cdn/shop/files/DSC_3928.jpg?v=1769670706&width=480)
![[Used] K18YG RUBY Ruby Ring R2.80ct D0.11ct NGL Certificate of Authenticity 7.2g #15](http://koufuku.jp/cdn/shop/files/2000000115467_3.jpg?v=1762391161&width=480)
![[Pre-owned] 18K Yellow Gold Ruby Ring, R3.15ct, D0.67ct, 8.3g, #9](http://koufuku.jp/cdn/shop/files/2000000014210_2.jpg?v=1762391180&width=480)
![[Pre-owned] 18K Yellow Gold Ruby Ring, R4.17ct, D0.24ct, 6.5g, #13](http://koufuku.jp/cdn/shop/files/2000000016276_2.jpg?v=1762391163&width=480)
![[Pre-owned] 18K Yellow Gold Ruby Ring, R 0.68ct, D 0.05ct, 5.9g, #12](http://koufuku.jp/cdn/shop/files/2000000127507_2.jpg?v=1767585980&width=480)
![[Pre-owned] 18K Yellow Gold Ruby Ring, R 0.75ct, D 0.46ct, 6.3g, #10](http://koufuku.jp/cdn/shop/files/2000000121666_2.jpg?v=1768444653&width=480)
![[Pre-owned] 18K Yellow Gold RUBY Ruby and Diamond Ring, R0.19ct, D0.12ct, 4.2g, #12](http://koufuku.jp/cdn/shop/files/DSC_2005.jpg?v=1761632346&width=480)
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![[Pre-owned] 18K Yellow Gold Ruby and Diamond Ring, R 0.69ct, D 0.05ct, 4.5g, #12](http://koufuku.jp/cdn/shop/files/DSC_2011.jpg?v=1761632467&width=480)
![[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] K18YG RUBY Ruby & Diamond Ring 6.9g #9.5](http://koufuku.jp/cdn/shop/files/2000000043555_2.jpg?v=1762391102&width=480)
![[Pre-owned] K18YG RUBY Ruby & Diamond Ring R0.50ct D0.50ct 5.6g #10](http://koufuku.jp/cdn/shop/files/2000000105567_2.jpg?v=1762397786&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] K18YG SAPPHIRE RING Sapphire Ring S0.30ct D0.30ct 4.0g #9](http://koufuku.jp/cdn/shop/files/2000000123882_2.jpg?v=1768882395&width=480)
![[Pre-owned] K18YG SAPPHIRE RING Sapphire ring S0.906ct D0.36ct 7.0g #12](http://koufuku.jp/cdn/shop/files/2000000117225_2.jpg?v=1768185637&width=480)
![[Pre-owned] K18YG SAPPHIRE RING Sapphire ring S1.05ct 7.3g #11.5](http://koufuku.jp/cdn/shop/files/2000000128696_2.jpg?v=1771316784&width=480)
![[Pre-owned] K18YG SAPPHIRE RING Sapphire ring S1.05ct D0.30ct 6.1g #12.5](http://koufuku.jp/cdn/shop/files/2000000106533_2.jpg?v=1765161884&width=480)
![[Pre-owned] K18YG SAPPHIRE RING Sapphire ring S1.29ct D1.53ct with GRJ sorting 9.5g #12](http://koufuku.jp/cdn/shop/files/2000000071367_3.jpg?v=1765175629&width=480)
![[Pre-owned] K18YG SAPPHIRE RING Sapphire ring S4.54ct S0.53ct D0.40ct 8.7g #13](http://koufuku.jp/cdn/shop/files/2000000068893_2.jpg?v=1768444693&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.
![[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)
