Gems, Jewelry and Precious Metals
Showing 1386 products
![[Pre-owned] 18K Yellow Gold 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] K18YG Golden Pearl Ring, 12.0mm, D0.38t, 7.7g, #11.5](http://koufuku.jp/cdn/shop/files/2000000040493_2.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] K18WG Emerald Ring E0.85ct D0.42ct 2.7g #10.5](http://koufuku.jp/cdn/shop/files/2000000036205_2.jpg?v=1750401687&width=480)
![[Used] PT1000 DIAMOND Ring D0.15ct 9.0g #14 with sorting](http://koufuku.jp/cdn/shop/files/2000000009087_3.jpg?v=1750401687&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)
![[Used] 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, GGC Certificate, 3.1g, #12](http://koufuku.jp/cdn/shop/files/2000000069357_3.jpg?v=1750472222&width=480)
![[Used] 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] K18YG GOLDEN PEARL Golden Pearl Ring 13.1mm D0.17ct 9.7g #14](http://koufuku.jp/cdn/shop/files/2000000056531_2.jpg?v=1750472223&width=480)
![[Used] PT900 PEARL White South Sea Pearl Ring, 10.0mm, D0.13ct, 7.7g, #12.5](http://koufuku.jp/cdn/shop/files/2000000094144_2.jpg?v=1750472222&width=480)
![[Pre-owned] K18WG CATS EYE Cat's Eye Ring, CE 1.13ct, D 0.21ct, 3.4g, #15](http://koufuku.jp/cdn/shop/files/2000000042725_2.jpg?v=1750472223&width=480)
![[Pre-owned] K18WG DIAMOND Diamond Full Eternity Ring D3.25ct 4.8g #13](http://koufuku.jp/cdn/shop/files/2000000069326_2.jpg?v=1750472223&width=480)
![[Pre-owned] K18WG DIAMOND Diamond Ring 0.55ct D1.50ct 9.6g #13.5](http://koufuku.jp/cdn/shop/files/2000000039336_2.jpg?v=1750923953&width=480)
![[Used] PT900 Diamond Ring 0.31ct 5.0g #10](http://koufuku.jp/cdn/shop/files/2000000018263_2.jpg?v=1750923952&width=480)
![[Used] PT900 Diamond Ring 0.30ct D0.16ct 4.3g #11.5](http://koufuku.jp/cdn/shop/files/2000000101712_2.jpg?v=1750923952&width=480)
![[Used] K18WG DIAMOND Diamond Ring D1.56ct 6.0g #8](http://koufuku.jp/cdn/shop/files/2000000039084_2.jpg?v=1750923954&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] K18WG DIAMOND Ring D0.70ct 3.8g #11.5](http://koufuku.jp/cdn/shop/files/2000000053394_2.jpg?v=1750923953&width=480)
![[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)
