Showing 1964 products
![[Pre-owned] K18YG Golden Pearl Ring 13.1mm D0.17ct 9.7g #14](http://koufuku.jp/cdn/shop/files/2000000056531_2.jpg?v=1750472223&width=480)
![[Pre-owned] PT900 EMERALD Ring E0.98ct D0.45ct 5.3g #7](http://koufuku.jp/cdn/shop/files/2000000089584_2.jpg?v=1750472222&width=480)
![[Pre-owned] PT900 EMERALD Ring E0.83ct D1.58ct 9.4g #11](http://koufuku.jp/cdn/shop/files/2000000013169_2.jpg?v=1750472222&width=480)
![[Pre-owned] K18WG Diamond Ring, D1.13ct, with GGC Appraisal, 3.1g, Size 12](http://koufuku.jp/cdn/shop/files/2000000069357_3.jpg?v=1750472222&width=480)
![[Used] K18WG DIAMOND RING Princess Cut Diamond Double Eternity Ring 2.00ct 5.9g #12](http://koufuku.jp/cdn/shop/files/2000000064321_2.jpg?v=1750472222&width=480)
![[Pre-owned] K18WG Chrysoberyl Cat's Eye Ring, CE 2.55ct, D 0.12ct, 3.1g, Size 12](http://koufuku.jp/cdn/shop/files/2000000045511_2.jpg?v=1750472222&width=480)
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![[Pre-owned] PT1000 Diamond Ring, D0.15ct, 9.0g, Size 14, with Sorting Report](http://koufuku.jp/cdn/shop/files/2000000009087_3.jpg?v=1750401687&width=480)
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![[Pre-owned] PT900 Diamond Ring 0.537ct I Color VS2 Class Good Cut CGL Sorting 4.4g #11](http://koufuku.jp/cdn/shop/files/2000000088587_3.jpg?v=1750401687&width=480)
![[Pre-owned] PT900 Diamond Ring, 0.407ct, F Color, SI2 Clarity, Good Cut, D0.07ct, 7.6g, Size 20, with CGL Certificate](http://koufuku.jp/cdn/shop/files/2000000056524_3.jpg?v=1750401687&width=480)
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![[Pre-owned] K18WG Ruby Ring, Pigeon Blood, Unheated, R1.02ct D0.30ct, 3.6g, Size 14, with AIGS Certificate](http://koufuku.jp/cdn/shop/files/2000000034201_3.jpg?v=1750401687&width=480)
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![[Pre-owned] PT900 Treated Blue & Colorless Diamond Ring TB0.63ct D1.56ct 13.1g #10](http://koufuku.jp/cdn/shop/files/2000000010113_2.jpg?v=1750401687&width=480)
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![[Pre-owned] K18YG Golden Pearl Ring 12.0mm D0.38ct 7.7g #11.5](http://koufuku.jp/cdn/shop/files/2000000040493_2.jpg?v=1750401687&width=480)
![[Pre-owned] K18YG AKOYA PEARL Ring 6.5-7.5mm 6.8g #15.5](http://koufuku.jp/cdn/shop/files/2000000043104_2.jpg?v=1750401687&width=480)
![[Pre-owned] K18WG Emerald Ring E0.886ct D0.58ct 4.0g #12.5](http://koufuku.jp/cdn/shop/files/2000000042855_2.jpg?v=1750401688&width=480)
![[Used] PT900 EMERALD RING E0.91ct D0.52ct 8.1g #13](http://koufuku.jp/cdn/shop/files/2000000022383_2.jpg?v=1750401687&width=480)
![[Pre-owned] K18WG Mozambique Unheated Ruby Ring R2.01ct D1.08ct 6.1g #12 GRS Certified](http://koufuku.jp/cdn/shop/files/2000000068985_4.jpg?v=1750401687&width=480)
![[Pre-owned] K18YG GOLDEN PEARL Ring 12.9mm D0.50ct 9.5g #11.5](http://koufuku.jp/cdn/shop/files/57309_01.jpg?v=1750402127&width=480)
![[Pre-owned] K18WG Black Opal Ring BO0.50ct D0.20ct 1.7g #13](http://koufuku.jp/cdn/shop/files/2000000036847_2.jpg?v=1750401687&width=480)
![[Pre-owned] K18WG Black Opal Ring BO1.85ct D0.28ct 4.0g #12](http://koufuku.jp/cdn/shop/files/2000000045924_2.jpg?v=1750401688&width=480)
![[Pre-owned] K18WG Black Opal Ring, BO 2.46ct, D 0.35ct, 4.1g, Size 13](http://koufuku.jp/cdn/shop/files/2000000039435_2.jpg?v=1750401687&width=480)
![[Pre-owned] K18WG Black Opal Ring BO2.10ct D0.40ct 3.4g #13](http://koufuku.jp/cdn/shop/files/2000000043487_2.jpg?v=1750401687&width=480)
![[Pre-owned] PT900 Ruby Ring R0.50ct D0.50ct 4.8g #9 GGS Sorting](http://koufuku.jp/cdn/shop/files/2000000022048_3.jpg?v=1750401687&width=480)
![[Pre-owned] K18WG Black Opal Ring BO1.32ct D0.13ct 2.5g #13](http://koufuku.jp/cdn/shop/files/2000000036816_2.jpg?v=1750401687&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)