Gems, Jewelry and Precious Metals
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![[Used] TIFFANY & Co. K18YG Diamond Stacking Band Ring 3.7g #6.5](http://koufuku.jp/cdn/shop/files/2000000048079_2.jpg?v=1752729165&width=480)
![[Used] MIKIMOTO PT900 DIAMOND Diamond Ring 1.467ct E VS1 d0.38ct 6.1g #12](http://koufuku.jp/cdn/shop/files/2000000069425_3.jpg?v=1752738489&width=480)
![[Used] TASAKI PT900 Diamond Ring D1.00ct 5.0g #10](http://koufuku.jp/cdn/shop/files/2000000020112_2.jpg?v=1752738669&width=480)
![[Used] TASAKI K18WG Onyx/Shell DIAMOND Ring 0.28ct 0.13ct 11.8g #12](http://koufuku.jp/cdn/shop/files/2000000012780_2.jpg?v=1752770818&width=480)
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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.