Gems, Jewelry, and Precious Metals
Showing 1929 products
![[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] 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] 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 JADEITE Ring, J2.27ct, D0.41ct, with GGS Sorting, 6.3g, #9.5](http://koufuku.jp/cdn/shop/files/2000000021942_3.jpg?v=1746157084&width=480)
![[Pre-owned] PT900 JADEITE Ring, J3.28ct, D0.43ct, with Japan Jewelry Association Sorting Report, 8.9g, Size 15.5](http://koufuku.jp/cdn/shop/files/2000000075372_3.jpg?v=1746157250&width=480)
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![[Pre-owned] PT900 Jadeite Ring J1.95ct D0.67ct with GRJ Sorting, 5.7g, Size 10](http://koufuku.jp/cdn/shop/files/2000000011172_3.jpg?v=1746161116&width=480)
![[Pre-owned] K18WG Blue Topaz Ring, D0.690ct, D1.00ct, 16.1g, Size 13](http://koufuku.jp/cdn/shop/files/2000000069661_2.jpg?v=1746161371&width=480)
![[Pre-owned] K18WG Opal Ring 1.06ct 0.08ct 2.1g #13.5](http://koufuku.jp/cdn/shop/files/2000000045535_2.jpg?v=1746161481&width=480)
![[Pre-owned] PT900 Tahiti Pearl Ring 10.7mm D0.23ct 6.8g #8](http://koufuku.jp/cdn/shop/files/2000000026343_2.jpg?v=1746161613&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] PT900 Tahiti Pearl Ring 10.2mm D0.04ct 5.4g #11.5](http://koufuku.jp/cdn/shop/files/2000000008349_2.jpg?v=1746161717&width=480)
![[Pre-owned] PT900 Tahiti Pearl Ring 11.2mm 5.9g #10, with appraisal report](http://koufuku.jp/cdn/shop/files/2000000033556_3.jpg?v=1746161823&width=480)
![[Pre-owned] K18WG Tahiti Pearl Ring P9.1mm D0.51ct 5.3g #10](http://koufuku.jp/cdn/shop/files/2000000006437_2.jpg?v=1746161885&width=480)
![[Pre-owned] PT900 AKOYA Pearl Ring 7.5mm D0.08ct 5.5g #16](http://koufuku.jp/cdn/shop/files/2000000080949_2.jpg?v=1746161933&width=480)
![[Pre-owned] K18YG South Sea Pearl Ring 12.6mm 12.8mm 10.8mm 19.5g #12](http://koufuku.jp/cdn/shop/files/2000000071336_2.jpg?v=1746161988&width=480)
![[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)