Showing 131 products
![[Pre-owned] K18WG Emerald Ring, E2.23ct, D0.53ct, 4.8g, #13.5](http://koufuku.jp/cdn/shop/files/2000000041827_2.jpg?v=1766801414&width=480)
![[Used] PT900 Emerald Ring, E0.93ct, D0.76ct, CGL Sorting, 5.9g, #13, Handmade](http://koufuku.jp/cdn/shop/files/2000000125916_3.jpg?v=1766801414&width=480)
SHOW YAMAGATA
Pre-owned SHOW YAMAGATA K18WG DIAMOND Ring, D0.25ct, 9.9g, Certificate of A[...]
¥277,000
![[Used] PT900 RUBY RING Ruby ring R0.56ct D0.08c t4.9g #11](http://koufuku.jp/cdn/shop/files/2000000117423_2.jpg?v=1766221258&width=480)
![[Used] K18WG DIAMOND Diamond Ring D1.95ct 7.1g #12](http://koufuku.jp/cdn/shop/files/2000000039015_2.jpg?v=1766221258&width=480)
![[Used] PT900 BLACK OPAL Black Opal Ring, BO 3.45ct, D 0.62ct, 4.7g, #16.5](http://koufuku.jp/cdn/shop/files/2000000018195_2.jpg?v=1766219128&width=480)
![[Pre-owned] K18YG/PT900 White Opal Ring, OP 1.09ct, D 0.28ct, 7.7g, #14](http://koufuku.jp/cdn/shop/files/2000000037905_2.jpg?v=1766219054&width=480)
![[Used] PT900 DIAMOND Ring D0.27ct 9.1g #19](http://koufuku.jp/cdn/shop/files/2000000007199_2.jpg?v=1766219043&width=480)
![[Used] PT900 SPODUMENE Kunzite Ring 4.36ct D0.51ct 11.7g #14](http://koufuku.jp/cdn/shop/files/2000000106137_2.jpg?v=1766219023&width=480)
![[Pre-owned] K18WG SAPPHIRE Sapphire Ring, S1.55ct, D0.47ct, 3.1g, #13.5](http://koufuku.jp/cdn/shop/files/2000000045269_2.jpg?v=1766219022&width=480)
![[Used] PT900 MEXICO OPAL Mexican Opal Ring, MO 6.27ct, D 1.35ct, 15.0g, #15](http://koufuku.jp/cdn/shop/files/2000000024004_2.jpg?v=1766219023&width=480)
![[Pre-owned] PT900 TOURMALINE Red Tourmaline (Rubellite) Ring, 1.64ct, D0.52ct, GRJ Sorting, 12.4g, #12.5](http://koufuku.jp/cdn/shop/files/2000000049632_3.jpg?v=1765877430&width=480)
![[Pre-owned] K18YG/PT900 Diamond Ring MQ0.17ct D0.24ct 11.5g #16](http://koufuku.jp/cdn/shop/files/2000000124728_2.jpg?v=1765877332&width=480)
![[Pre-owned] K18YG SAPPHIRE Ring, S0.89ct, D1.18ct, Sorting, 5.8g, #13](http://koufuku.jp/cdn/shop/files/2000000117089_3.jpg?v=1765877331&width=480)
![[Pre-owned] 18K Yellow Gold Akoya Pearl Ring, 3.3mm-3.8mm, 3.7g, #9](http://koufuku.jp/cdn/shop/files/2000000099224_2.jpg?v=1765877331&width=480)
![[Pre-owned] 18K Yellow Gold Ruby Ring, R 0.61ct, D 0.38ct, 6.3g, #8](http://koufuku.jp/cdn/shop/files/2000000052793_2.jpg?v=1764915892&width=480)
![[Pre-owned] K18WG RUBY Ruby Ring, R1.16ct, D0.15ct, 2.6g, #13.5](http://koufuku.jp/cdn/shop/files/2000000035987_2.jpg?v=1764830303&width=480)
![[Pre-owned] 18K Yellow Gold South Sea Pearl Baroque Pearl Pendant Necklace, 11.8mm, 5.0g](http://koufuku.jp/cdn/shop/files/2000000099231_2.jpg?v=1764830276&width=480)
![[Used] K18WG RUBY Ruby ring R0.99ct D0.70ct AIGS non-heated identification book 2.8g #13.5](http://koufuku.jp/cdn/shop/files/2000000047881_4.jpg?v=1764830276&width=480)
![[Pre-owned] K18WG Emerald Ring, E2.40ct, D0.26ct, 2.9g, #13.5](http://koufuku.jp/cdn/shop/files/2000000036212_2.jpg?v=1762316313&width=480)
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)
