Showing 1961 products
![[Pre-owned] K18 Diamond Ring D0.53ct 2.5g #12](http://koufuku.jp/cdn/shop/files/70216_01.jpg?v=1743142006&width=480)
![[Pre-owned] K18WG Sapphire Ring S0.27ct D0.28ct 5.2g #14](http://koufuku.jp/cdn/shop/files/81045_01.jpg?v=1743141936&width=480)
![[Pre-owned] PT900 SAPPHIRE Ring S0.97ct D0.45ct 4.4g #11](http://koufuku.jp/cdn/shop/files/71992_01.jpg?v=1743141901&width=480)
![[Pre-owned] TASAKI PT900 Sapphire Ring, S0.95ct, D0.30ct, 4.5g, Size 11](http://koufuku.jp/cdn/shop/files/77260_01_d30ebf56-f36f-4ec5-a044-ce5a4bcd8ea0.jpg?v=1743141759&width=480)
![[Pre-owned] K18WG Ruby Ring R0.68ct D0.33ct 2.9g #14](http://koufuku.jp/cdn/shop/files/69036_01_c42127e3-11c8-40b2-8fad-527280ba9a89.jpg?v=1743141669&width=480)
![[Pre-owned] PT900 RUBY Ring R1.055ct D0.73ct 3.8g #13](http://koufuku.jp/cdn/shop/files/17495_01.jpg?v=1743141577&width=480)
![[Pre-owned] PT900 RUBY Ring R0.67ct D0.28ct 5.1g #12](http://koufuku.jp/cdn/shop/files/18829_01.jpg?v=1743141509&width=480)
![[Pre-owned] Pt900 Aquamarine Ring A2.20ct D0.40ct 10.0g #12 with CGL Sorting](http://koufuku.jp/cdn/shop/files/2000000054551_8.jpg?v=1742268292&width=480)
![[Pre-owned] K18WG Black Opal Ring BO4.10ct D0.13ct 3.2g](http://koufuku.jp/cdn/shop/files/2000000045214_7.jpg?v=1741937635&width=480)
![[Pre-owned] K18WG Sapphire Ring S2.04ct D0.55ct 4.4g #12.5](http://koufuku.jp/cdn/shop/files/2000000043722_8.jpg?v=1741937169&width=480)
![[Pre-owned] K18WG Cat's Eye Ring, CE4.05ct D0.33ct, 5.1g, #14](http://koufuku.jp/cdn/shop/files/2000000036519_7.jpg?v=1741936274&width=480)
![[Pre-owned] PT900 CATS EYE Ring CE4.93ct D1.33ct 12.9g](http://koufuku.jp/cdn/shop/files/2000000018638_7.jpg?v=1751594976&width=480)
![[Pre-owned] Pt900 Emerald Ring, E1.59ct, D1.39ct, Muzo Mine, Colombia, with GRS certification](http://koufuku.jp/cdn/shop/files/2000000019840_9.jpg?v=1752729165&width=480)
![[Pre-owned] PT900 Alexandrite Ring, A0.62ct, D0.74ct, 9.6g, with GIA Report, Origin: Brazil](http://koufuku.jp/cdn/shop/files/2000000014173_3.jpg?v=1741931451&width=480)
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![[Pre-owned] PT900 Black Opal Ring, BO 3.20ct, D 1.78ct, 12g, Size 12.5](http://koufuku.jp/cdn/shop/files/2000000013916_3.jpg?v=1741930768&width=480)
![[Pre-owned] K18WG Ruby Ring, R1.03ct D0.11ct, Pigeon Blood, AIGS Certificate, 2.2g](http://koufuku.jp/cdn/shop/files/2000000035895_3.jpg?v=1740381216&width=480)
![[Pre-owned] PT900 Alexandrite Ring, A2.58ct D0.50ct, 5.5g, GIA](http://koufuku.jp/cdn/shop/files/2000000022819_3.jpg?v=1740051123&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)