Showing 1419 products
![[Used] PT900 Alexandrite Ring A0.22ct D0.50ct Central Gem Laboratory Sorting 6.7g #12](http://koufuku.jp/cdn/shop/files/2000000068572_2.jpg?v=1745901847&width=480)
Sold Out
![[Used] PT900 Chrysoberyl Cat's Eye Ring CE2.51ct D0.32ct Central Gem Laboratory Sorting 4.8g #10.5](http://koufuku.jp/cdn/shop/files/2000000019123_3.jpg?v=1745901753&width=480)
![[Used] PT900 Diamond Ring 0.613ct F SI2 Good Central Gem Laboratory Sorting 4.5g #11](http://koufuku.jp/cdn/shop/files/2000000012544_3.jpg?v=1750143322&width=480)
Sold Out
![[Used] K18YG Garnet Ring G11.42ct D0.72ct with Gem Research Japan Sorting 14.6g #14](http://koufuku.jp/cdn/shop/files/2000000073583_2.jpg?v=1745901557&width=480)
![[Used] POLA K18YG Diamond Ring D0.38ct 5.4g #13](http://koufuku.jp/cdn/shop/files/2000000053110_2.jpg?v=1745900526&width=480)
![[Used] MAXI K18YG Diamond Ring D0.272ct D0.20ct #10 2.6g](http://koufuku.jp/cdn/shop/files/2000000011349_2.jpg?v=1745899726&width=480)
![[Used] GUCCI K18PG Octagonal Ring 3.2g #13](http://koufuku.jp/cdn/shop/files/2000000028477_2.jpg?v=1745899607&width=480)
![[Used] LUCIE K18PG Diamond Ring D0.255ct 1.5g #5.5](http://koufuku.jp/cdn/shop/files/2000000014401_2.jpg?v=1745899505&width=480)
![[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] TIFFANY & Co. Tiffany K18YG Diamond Open Heart Ring 4.1g #11](http://koufuku.jp/cdn/shop/files/2000000026596_2.jpg?v=1745899354&width=480)
![[Used] BVLGARI Bulgari K18WG/YG Tronchetto Ring #10.5 9.3g](http://koufuku.jp/cdn/shop/files/2000000015118_2.jpg?v=1745893516&width=480)
![[Used] TIFFANY & Co. Tiffany K18YG T1 Narrow Ring 4g #9](http://koufuku.jp/cdn/shop/files/2000000014746_2.jpg?v=1745893399&width=480)
![[Used] CARTIER K18WG/ceramic Mylon Panthere diamond ring 11.9g #13.5](http://koufuku.jp/cdn/shop/files/2000000088259_2.jpg?v=1745125488&width=480)
![[Used] CHANEL ULTRA K18WG/Black Ceramic Diamond Ring 6.9g #14](http://koufuku.jp/cdn/shop/files/2000000072982_2.jpg?v=1745125142&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)
![[Pre-owned] VALENTINO K18WG Diamond Ring D0.78ct 11.2g #15 ONE PRICE](http://koufuku.jp/cdn/shop/files/2000000065175_2.jpg?v=1745124693&width=480)
![[Used] POLA K18YG Sapphire, Ruby, Emerald Ring S0.13ct R0.07ct E0.05ct D0.13ct 5.5g #12](http://koufuku.jp/cdn/shop/files/2000000052922_2.jpg?v=1745124569&width=480)
Sold Out
![[Used] 4℃ K18YG Peridot Pink Tourmaline Ring 3.3g #9.5](http://koufuku.jp/cdn/shop/files/2000000023076_2.jpg?v=1745124088&width=480)
![[Used] OMEGA K18WG My Choice Diamond Set Ring 15.2g #10.5](http://koufuku.jp/cdn/shop/files/2000000021065_2.jpg?v=1745123375&width=480)
![[Used] GUCCI 18WG Diamantissima Ring 4.9g #14](http://koufuku.jp/cdn/shop/files/2000000013572_2.jpg?v=1745122098&width=480)
![[Used] CHAUMET K18WG CLASSONE Ring 8.1g #8](http://koufuku.jp/cdn/shop/files/2000000013374_2.jpg?v=1745121267&width=480)
Sold Out
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 Ruby Unheated Ruby Ring R1.297ct D0.832ct R0.643ct GIA Certificate Included 10.9g](http://koufuku.jp/cdn/shop/files/2000000068664_3.jpg?v=1744950753&width=480)
![[Used] K18WG Burmese unheated ruby ring R0.71ct D0.50ct #8.5 GIA certificate of origin included 2.4g](http://koufuku.jp/cdn/shop/files/2000000068381_3.jpg?v=1744950294&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)
