Gems, Jewelry, and Precious Metals
Showing 1929 products
![[Pre-owned] K18YG Diamond Cat Ring, 5.1g, Size 12.5](http://koufuku.jp/cdn/shop/files/2000000124483_2.jpg?v=1767586001&width=480)
![[Pre-owned] K18WG/K18YG Colorless & Yellow Diamond Ring 14.6g #14](http://koufuku.jp/cdn/shop/files/2000000070018_2.jpg?v=1767586001&width=480)
![[Pre-owned] PT900 DIAMOND Ring D0.75ct 6.0g #15](http://koufuku.jp/cdn/shop/files/2000000107028_2.jpg?v=1767586001&width=480)
![[Pre-owned] K18YG/PT900 DIAMOND RING D1.00ct 11.8g #13](http://koufuku.jp/cdn/shop/files/2000000124544_2.jpg?v=1767586002&width=480)
![[Pre-owned] PT900/K18YG Diamond Ring D0.59ct 8.1g #8.5](http://koufuku.jp/cdn/shop/files/2000000126609_2.jpg?v=1767586002&width=480)
![[Pre-owned] PT900 DIAMOND V-line Ring D0.46ct 5.8g #12](http://koufuku.jp/cdn/shop/files/2000000121840_2.jpg?v=1767586014&width=480)
![[Pre-owned] K18YG/WG Ruby Ring D0.42ct 6.8g #13](http://koufuku.jp/cdn/shop/files/2000000121680_2.jpg?v=1767586014&width=480)
![[Pre-owned] 18K WG Burmese Ruby Ring, Ruby 1.19ct, Diamond 0.68ct, with GUILD "Pigeon Blood" Certificate, 5.5g, Size 13](http://koufuku.jp/cdn/shop/files/2000000041575_3.jpg?v=1767586019&width=480)
![[Pre-owned] K18YG DIAMOND RING Diamond/Ruby Ring D0.40ct 3.1g #12.5](http://koufuku.jp/cdn/shop/files/2000000087917_2.jpg?v=1767586039&width=480)
![[Pre-owned] K18YG DIAMOND & RUBY RING D0.35ct D0.20ct R0.46ct 5.1g #8.5](http://koufuku.jp/cdn/shop/files/2000000126210_2.jpg?v=1767586039&width=480)
![[Pre-owned] K18WG Burmese Ruby Ring, R1.18ct D0.96ct, with AIGS "Pigeon Blood" certificate, 3.9g, Size #13](http://koufuku.jp/cdn/shop/files/2000000069029_4.jpg?v=1767586051&width=480)
![[Pre-owned] PT900 MEXICO OPAL Ring OP1.59ct D0.22ct 5.8g #11](http://koufuku.jp/cdn/shop/files/2000000029542_2.jpg?v=1767586070&width=480)
![[Pre-owned] PT900 RUBY Ring R4.09ct D0.21ct 8.6g #16](http://koufuku.jp/cdn/shop/files/2000000125954_2.jpg?v=1767586070&width=480)
![[Pre-owned] K18WG Black Opal Ring BO2.00ct D0.27ct 4.3g #12.5](http://koufuku.jp/cdn/shop/files/2000000036731_2.jpg?v=1767586070&width=480)
![[Pre-owned] K18WG Unheated Heart-Shaped Ruby Ring R1.12ct D0.32ct with AIGS "Pigeon Blood" Certificate, 3.1g, Size 13.5](http://koufuku.jp/cdn/shop/files/2000000034638_3.jpg?v=1767586070&width=480)
![[Pre-owned] PT900 Sri Lankan Unheated Ruby Ring R2.00ct D0.95ct GIA Certified 6.2g #12](http://koufuku.jp/cdn/shop/files/2000000121772_3.jpg?v=1767586070&width=480)
![[Pre-owned] PT900 BLACK OPAL Ring BO2.452ct D0.35ct with GRJ Sorting 6.8g #11](http://koufuku.jp/cdn/shop/files/2000000019253_3.jpg?v=1767586070&width=480)
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![[Pre-owned] MIKIMOTO PT900 Tahiti Pearl Ring P10.5mm 8.0g #6 ONE PRICE](http://koufuku.jp/cdn/shop/files/2000000015538_2.jpg?v=1768096999&width=480)
![[Pre-owned] K18PG DIAMOND RING Diamond Belt Ring D0.40ct 8.4g #12.5](http://koufuku.jp/cdn/shop/files/2000000121895_2.jpg?v=1768185637&width=480)
![[Pre-owned] K18YG SAPPHIRE RING Sapphire 0.906ct Diamond 0.36ct 7.0g #12](http://koufuku.jp/cdn/shop/files/2000000117225_2.jpg?v=1768185637&width=480)
![[Pre-owned] K18YG Ruby & Diamond Ring R0.54ct D0.87ct 8.5g #11.5](http://koufuku.jp/cdn/shop/files/2000000121352_2.jpg?v=1768185637&width=480)
![[Pre-owned] 18K Yellow Gold Sapphire Ring 6.2g #11](http://koufuku.jp/cdn/shop/files/DSC_2004.jpg?v=1775188486&width=480)
![[Pre-owned] Charite K18YG Moonstone Ring D0.04ct 2.2g #9](http://koufuku.jp/cdn/shop/files/2000000045054_2.jpg?v=1768185641&width=480)
![[Pre-owned] STAR JEWELRY K18YG DIAMOND RING Diamond Pinky Ring D0.05ct 1.9g #4 ONE PRICE](http://koufuku.jp/cdn/shop/files/2000000121970_2.jpg?v=1768185641&width=480)
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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)