Showing 1288 products
![[Pre-owned] K18WG BLACK OPAL Black Opal Ring, BO 1.01ct, D 0.89ct, 3.8g, #13](http://koufuku.jp/cdn/shop/files/2000000039770_2.jpg?v=1750401687&width=480)
![[Pre-owned] K18WG BLACK OPAL Black Opal Ring, BO 1.85ct, D 0.28ct, 4.0g, #12](http://koufuku.jp/cdn/shop/files/2000000045924_2.jpg?v=1750401688&width=480)
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![[Pre-owned] K18WG BLACK OPAL Black Opal Ring, BO 2.15ct, D 0.56ct, 4.0g, #13](http://koufuku.jp/cdn/shop/files/2000000034553_2.jpg?v=1760667249&width=480)
![[Pre-owned] K18WG BLACK OPAL Black Opal Ring, BO 2.46ct, D 0.35ct, 4.1g, #13](http://koufuku.jp/cdn/shop/files/2000000039435_2.jpg?v=1750401687&width=480)
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![[Pre-owned] K18WG BLACK OPAL Black Opal Ring, BO 0.90ct, D 0.15ct, 2.7g, #13](http://koufuku.jp/cdn/shop/files/2000000036861_2.jpg?v=1762397785&width=480)
![[Pre-owned] K18WG BLACK OPAL Black Opal Ring, BO 1.22ct, D 0.11ct, 3.3g, #13.5](http://koufuku.jp/cdn/shop/files/2000000036632_2.jpg?v=1752392568&width=480)
![[Pre-owned] K18WG BLACK OPAL Black Opal Ring, BO 1.72ct, D 0.17ct, 3.6g](http://koufuku.jp/cdn/shop/files/2000000036595_2.jpg?v=1766801414&width=480)
![[Pre-owned] K18WG BLACK OPAL Black Opal Ring, BO 2.29ct, D 0.13ct, 3.4g, #13.5](http://koufuku.jp/cdn/shop/files/2000000036830_2.jpg?v=1752392569&width=480)
![[Pre-owned] K18WG BLACK OPAL Black Opal Ring, BO 3.80ct, D 0.58ct, 5.4g, #12](http://koufuku.jp/cdn/shop/files/2000000069890_2.jpg?v=1766219128&width=480)
![[Pre-owned] 18K White Gold Boulder Opal Ring, OP 4.09ct, D 0.51ct, 6.7g, #13](http://koufuku.jp/cdn/shop/files/2000000070650_2.jpg?v=1768800609&width=480)
![[Used] K18WG CATS EYE 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] K18WG CATS EYE Cat's Eye Ring CE2.03ct D0.30ct 3.6g #13](http://koufuku.jp/cdn/shop/files/2000000067629_2.jpg?v=1752392530&width=480)
![[Pre-owned] K18WG CATS EYE Chrysoberyl Cat's Eye Ring, CE 2.55ct, D 0.12ct, 3.1g, #12](http://koufuku.jp/cdn/shop/files/2000000045511_2.jpg?v=1750472222&width=480)
![[Pre-owned] K18WG CATS EYE Chrysoberyl Cat's Eye Ring, CE 2.32ct, D 0.91ct, 6.1g, #13](http://koufuku.jp/cdn/shop/files/2000000034478_2.jpg?v=1763175991&width=480)
![[Pre-owned] K18WG CHALCEDONY Ruby and Chalcedony Ring, R 0.17ct, C 23.65ct, D 0.28ct, 15.3g, #11.5](http://koufuku.jp/cdn/shop/files/2000000076720_2.jpg?v=1752392450&width=480)
![[Pre-owned] K18WG CHALCEDONY chalcedony pendant necklace, C21.90ct, D0.28ct, 7.6g](http://koufuku.jp/cdn/shop/files/2000000076676_2.jpg?v=1762391101&width=480)
![[Pre-owned] K18WG Chrysoberyl Ring C0.808ct D0.35ct 4.5g #14](http://koufuku.jp/cdn/shop/files/2000000079967_3.jpg?v=1765159207&width=480)
KOUFUKU is an e-commerce site that handles a wide range of products, from jewelry and precious metals to brand bags, brand watches, brand apparel, and tableware. In addition to sales, we also offer a purchase service.
![[Used] PT900 SAPPHIRE RING Sapphire Ring S2.57ct D1.51ct 14.3g #15](http://koufuku.jp/cdn/shop/files/2000000071954_2.jpg?v=1768882396&width=480)
![[Pre-owned] MIKIMOTO PT950 ALEXANDRITE RING, A 0.42ct, D 0.62ct, 6.1g, #15, ONE PRICE](http://koufuku.jp/cdn/shop/files/2000000123844_3.jpg?v=1768882396&width=480)
