Showing 1787 products
![[Pre-owned] PT900 WHITE OPAL RING D0.43ct 9.2g #8.5](http://koufuku.jp/cdn/shop/files/2000000017716_2.jpg?v=1768800609&width=480)
![[Pre-owned] PT900 Chrysoberyl Cat's Eye Ring, CE2.51ct, D0.32ct, CGL Sorting, 4.8g, Size 10.5](http://koufuku.jp/cdn/shop/files/2000000019123_3.jpg?v=1745901753&width=480)
![[Pre-owned] PT900 Jade Ring J4.54ct D0.46ct 8.4g #12.5 with Identification Report](http://koufuku.jp/cdn/shop/files/2000000014609_8.jpg?v=1743407785&width=480)
![[Pre-owned] PT900/K18YG SAPPHIRE RING, Sapphire 7.62ct, Diamond 0.718ct, with GRS Certificate, 8.4g, Size 11](http://koufuku.jp/cdn/shop/files/2000000070155_4.jpg?v=1765175628&width=480)
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![[Pre-owned] PT900/K18YG Unheated Ruby Ring R1.065ct D0.84ct #12 4.6g with CGL Appraisal/Analysis Report](http://koufuku.jp/cdn/shop/files/2000000041988_3.jpg?v=1750401687&width=480)
![[Pre-owned] PT950 NO HEAT RUBY RING Mozambique-origin Unheated Ruby Ring R6.04ct D2.45ct GRS Certified 12.6g #12.5](http://koufuku.jp/cdn/shop/files/2000000018454_3.jpg?v=1768444693&width=480)
![[Pre-owned] PT950 NO-HEAT COLOR-CHANGING SAPPHIRE RING 16.54ct / Diamond 1.71ct / GRS Certified / 12.0g](http://koufuku.jp/cdn/shop/files/2000000013008_3.jpg?v=1785997562&width=480)
![[Pre-owned] PT950 NO-HEAT SAPPHIRE RING Sri Lankan Unheated Sapphire Ring S11.72ct D1.94ct GIA Certified 18.4g #9.5](http://koufuku.jp/cdn/shop/files/2000000019802_4.jpg?v=1785997859&width=480)
![[Pre-owned] PT950 Pink Sapphire Ring PS3.83ct D0.80ct With Sorting 5.4g #12](http://koufuku.jp/cdn/shop/files/2000000001265_3.jpg?v=1763175991&width=480)
![[Pre-owned] RING K18YG Thai Ruby Ring R3.21ct D2.51ct with GRS "intense to vivid red" certificate, 14.4g, size 13.5](http://koufuku.jp/cdn/shop/files/2000000113975_3.jpg?v=1765175629&width=480)
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![[Pre-owned] RING PT900 EMERALD RING E16.83ct D0.84ct CGL Sorting 16.1g #18](http://koufuku.jp/cdn/shop/files/2000000020990_3.jpg?v=1785995483&width=480)
![[Pre-owned] SV BAROQUE PEARL NECKLACE 10-12mm 88g](http://koufuku.jp/cdn/shop/files/2000000131917_2.jpg?v=1771658298&width=480)
![[Pre-owned] Sekikazu Partina Necklace K18WG DIAMOND Diamond Pendant Necklace 9.2g](http://koufuku.jp/cdn/shop/files/2000000120614_2.jpg?v=1768197670&width=480)
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![[Pre-owned] Necklace PT850/PT900 BLACK OPAL Pendant Necklace BO0.89ct D0.58ct CGL Sorting 6.5g](http://koufuku.jp/cdn/shop/files/2000000029221_4.jpg?v=1763176275&width=480)
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![[Pre-owned] Rhodochrosite (Inca Rose) / Imitation Pearl Necklace STEEL 63.6g](http://koufuku.jp/cdn/shop/files/2000000043654_2.jpg?v=1762315997&width=480)
![[Pre-owned] Muramatsu Tsukasa PT900 Ruby Cabochon Cut Ring R2.91ct D0.36ct 10.6g #10](http://koufuku.jp/cdn/shop/files/2000000012742_2.jpg?v=1768808621&width=480)
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![[Pre-owned] Mitsuo Kaji PT900 RUBELLITE TOURMALINE RING, 10.38ct Rubellite, 0.87ct Diamond, with GRJ Appraisal, 21.7g, Size 20.5](http://koufuku.jp/cdn/shop/files/2000000133867_3.jpg?v=1785993992&width=480)
![[Pre-owned] Shunichi Tamura K18/K18WG Diamond Pendant/Brooch D0.08ct 19.9g](http://koufuku.jp/cdn/shop/files/2000000114750_2.jpg?v=1768444692&width=480)
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![[Pre-owned] Nobuko Ishikawa K18/PT900 Diamond Ring D0.26ct 8.6g #10](http://koufuku.jp/cdn/shop/files/2000000077314_2.jpg?v=1765877458&width=480)
![[Used] Isako Kikuchi K18WG TOURMALINE RING T2.17ct G 0.14ct 0.06ct 9.6g #15](http://koufuku.jp/cdn/shop/files/2000000122113_2.jpg?v=1778492272&width=480)
![[Pre-owned] 18KWG Mexico Opal Ring, Handmade, 8.0g, Size 9](http://koufuku.jp/cdn/shop/files/2000000056975_2.jpg?v=1762397786&width=480)
![[Pre-owned] 18K Yellow Gold Ruby Ring 9.2g #14](http://koufuku.jp/cdn/shop/files/2000000126579_2.jpg?v=1767585974&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] 18K Yellow Gold Sapphire Ring 6.2g #11](http://koufuku.jp/cdn/shop/files/DSC_2004.jpg?v=1775188486&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)