Showing 1964 products
![[Pre-owned] PT900 JADEITE RING J1.483ct D1.16ct with Japan Gem Sciences Sorting, 8.5g, Size #8](http://koufuku.jp/cdn/shop/files/2000000126173_3.jpg?v=1767585964&width=480)
![[Pre-owned] K18YG Sapphire Ring S1.18ct D0.71ct 7.0g #17](http://koufuku.jp/cdn/shop/files/2000000125633_2.jpg?v=1767585964&width=480)
![[Pre-owned] K18YG Sapphire Ring, S1.73ct, D0.70ct, with sorting report, 6.8g, Size 15.5](http://koufuku.jp/cdn/shop/files/2000000126029_3.jpg?v=1767585957&width=480)
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![[Pre-owned] PT900 Rhodolite Garnet Ring, G2.41ct, D0.11ct, with CGL Sorting, 4.2g, Size 12.5](http://koufuku.jp/cdn/shop/files/2000000007397_3.jpg?v=1767585958&width=480)
![[Pre-owned] PT900 Burmese Ruby Ring, R1.53ct D0.55ct, GIA Certified, 5.4g](http://koufuku.jp/cdn/shop/files/2000000015972_3.jpg?v=1767585957&width=480)
![[Pre-owned] PT900 Garnet Ring, D0.17ct, 6.8g, Size 11](http://koufuku.jp/cdn/shop/files/2000000088761_2.jpg?v=1767585958&width=480)
![[Pre-owned] K18YG SAPPHIRE Ring S1.64ct D0.42ct with CGL Sorting, 6.6g, Size 11](http://koufuku.jp/cdn/shop/files/2000000126074_3.jpg?v=1767585957&width=480)
![[Pre-owned] PT900 SAPPHIRE Sapphire Ring S3.42ct D0.59ct 8.5g #19.5](http://koufuku.jp/cdn/shop/files/2000000084817_2.jpg?v=1767585888&width=480)
![[Pre-owned] K18WG Emerald Ring, Emerald 1.72ct, Diamond 0.71ct, 4.8g, Size 12](http://koufuku.jp/cdn/shop/files/2000000077246_2.jpg?v=1767585887&width=480)
![[Pre-owned] PT900 Alexandrite Ring, A0.22ct, D0.39ct, with Sorting, 5.0g, Size 12.5](http://koufuku.jp/cdn/shop/files/2000000017693_3.jpg?v=1767585888&width=480)
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![[Pre-owned] K18YG Emerald & Ruby Ring E0.45ct R0.42ct 6.3g #10](http://koufuku.jp/cdn/shop/files/2000000070568_2.jpg?v=1767585888&width=480)
![[Pre-owned] PT900 SAPPHIRE Ring S1.44ct D0.54ct 6.5g #14.5](http://koufuku.jp/cdn/shop/files/2000000028248_2.jpg?v=1767585888&width=480)
![[Pre-owned] PT900 Emerald Ring E2.43ct D0.72ct 7.4g #9](http://koufuku.jp/cdn/shop/files/2000000089683_2.jpg?v=1767585888&width=480)
![[Pre-owned] PT900 Emerald Ring E3.73ct D0.39ct 6.6g #12](http://koufuku.jp/cdn/shop/files/2000000015422_2.jpg?v=1767585887&width=480)
![[Pre-owned] PT900 DIAMOND Ring 0.402 D0.67ct 7.7g #16.5](http://koufuku.jp/cdn/shop/files/2000000012452_2.jpg?v=1767585887&width=480)
![[Pre-owned] PT900 Sapphire, Burmese Unheated Sapphire Ring, S3.39ct D1.30ct, GIA Report, 10.9g, #10](http://koufuku.jp/cdn/shop/files/2000000015064_3.jpg?v=1767585888&width=480)
![[Pre-owned] K18WG Sri Lankan Unheated Sapphire Ring S2.78ct D1.00ct with GRS Certificate, 5.6g, Size #13](http://koufuku.jp/cdn/shop/files/DSC_7850.jpg?v=1775190729&width=480)
![[Pre-owned] K18YG MEXICO OPAL Ring OP1.19ct D1.31ct 6.3g #10.5](http://koufuku.jp/cdn/shop/files/2000000057293_2.jpg?v=1767585887&width=480)
![[Pre-owned] K18YG Ruby Ring R0.90ct D1.40ct 4.8g #12.5](http://koufuku.jp/cdn/shop/files/2000000044606_2.jpg?v=1767585888&width=480)
![[Pre-owned] PT900 Grossular Garnet Ring G1.01ct D1.00ct 7.8g #16](http://koufuku.jp/cdn/shop/files/2000000015019_2.jpg?v=1767585887&width=480)
![[Pre-owned] PT900 EMERALD Ring E1.08ct D1.12ct 9.2g #13](http://koufuku.jp/cdn/shop/files/2000000014586_2.jpg?v=1767585887&width=480)
![[Pre-owned] K18WG EMERALD Emerald Ring E1.43ct D0.80ct 6.7g #14.5](http://koufuku.jp/cdn/shop/files/2000000094687_2.jpg?v=1767585888&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] PT950 Sri Lankan Unheated Sapphire Ring S6.164ct D1.55ct GIA Report 9.3g #12](http://koufuku.jp/cdn/shop/files/2000000015163_3.jpg?v=1767585887&width=480)
![[Pre-owned] PT900 EMERALD Ring E2.39ct D0.48ct 6.9g #14.5](http://koufuku.jp/cdn/shop/files/2000000029955_2.jpg?v=1767585888&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)