Gems, Jewelry, and Precious Metals
Showing 1929 products
![[Pre-owned] K18YG RUBY RING R1.87ct with Appraisal Certificate, 6.3g, Size 12.5](http://koufuku.jp/cdn/shop/files/DSC_3923.jpg?v=1769670683&width=480)
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![[Pre-owned] K18YG Ruby Ring R0.61ct D0.38ct 6.3g #8](http://koufuku.jp/cdn/shop/files/2000000052793_2.jpg?v=1764915892&width=480)
![[Pre-owned] K18YG RUBY RING R0.45ct D0.33ct 7.6g #14](http://koufuku.jp/cdn/shop/files/2000000116488_2.jpg?v=1764915892&width=480)
![[Pre-owned] K18WG Citrine Ring, C4.02ct, D0.16ct, with Appraisal Report, 7.90g, #8](http://koufuku.jp/cdn/shop/files/2000000044309_3.jpg?v=1765012877&width=480)
![[Pre-owned] PT900 Diamond V-shape Ring D0.80ct 4g #11](http://koufuku.jp/cdn/shop/files/2000000010021_2.jpg?v=1765012877&width=480)
![[Pre-owned] PT850 Black Opal Pendant Necklace 2.72ct D0.51ct 8.3g](http://koufuku.jp/cdn/shop/files/2000000058566_2.jpg?v=1765012877&width=480)
![[Pre-owned] K18WG Mozambique Unheated Ruby Ring R3.03ct D1.13ct GRS Certified, 8.0g, Size 13.5](http://koufuku.jp/cdn/shop/files/2000000034348_4.jpg?v=1765012878&width=480)
![[Pre-owned] K18WG Mozambique Unheated Ruby Pendant/Ring R2.08ct D1.32ct with AIGS "Pigeon Blood" Certificate, 7.4g, Size 13.5](http://koufuku.jp/cdn/shop/files/2000000090559_4.jpg?v=1765012877&width=480)
![[Pre-owned] HOSEHESS K18WG DIAMOND Diamond Pendant Necklace D2.08ct 12.9g ONE PRICE](http://koufuku.jp/cdn/shop/files/2000000072548_2.jpg?v=1765012877&width=480)
![[Pre-owned] K18YG Garnet Ring G1.26ct D0.61ct 6.7g #17.5](http://koufuku.jp/cdn/shop/files/2000000071763_2.jpg?v=1765012878&width=480)
![[Pre-owned] PT900 Garnet Ring G2.01ct D0.25ct 9.1g #10](http://koufuku.jp/cdn/shop/files/2000000006697_2.jpg?v=1765012877&width=480)
![[Pre-owned] 18K Yellow Gold Amethyst Ring, D0.04ct, 5.0g, Size 11.5](http://koufuku.jp/cdn/shop/files/2000000114309_2.jpg?v=1765012878&width=480)
![[Pre-owned] K18YG Ruby Ring R1.01ct D0.63ct 5.8g #12](http://koufuku.jp/cdn/shop/files/2000000037660_2.jpg?v=1765012877&width=480)
![[Pre-owned] La NOUVELLE BAGUE K18WG DIAMOND Ring 15g #11.5 ONE PRICE](http://koufuku.jp/cdn/shop/files/2000000025148_2.jpg?v=1765012878&width=480)
![[Pre-owned] K18WG Kunzite Ring K13.80ct D1.66ct 12.60g #14](http://koufuku.jp/cdn/shop/files/2000000044118_2.jpg?v=1765012877&width=480)
![[Pre-owned] PEARL & QUARTZ Freshwater Pearl & Crystal Necklace 22.6g](http://koufuku.jp/cdn/shop/files/2000000080222_2.jpg?v=1765012878&width=480)
![[Pre-owned] K18PG DIAMOND Ring D2.83ct 3.9g](http://koufuku.jp/cdn/shop/files/2000000039886_2.jpg?v=1765012878&width=480)
![[Pre-owned] K18YG Garnet Ring G5.24ct D0.05ct 7.8g #13.5](http://koufuku.jp/cdn/shop/files/2000000095950_2.jpg?v=1765012877&width=480)
![[Pre-owned] 18K White Gold Emerald Ring E6.68ct D2.88ct 9.8g #15.5](http://koufuku.jp/cdn/shop/files/2000000069296_2.jpg?v=1765159205&width=480)
![[Pre-owned] K18WG Emerald Ring E5.67ct D0.40ct 4.5g #12.5](http://koufuku.jp/cdn/shop/files/2000000036038_2.jpg?v=1765159205&width=480)
![[Pre-owned] K18WG Colombian Emerald Ring, Emerald 4.30ct, Diamond 1.64ct, with GRS Certificate, 7.7g, Size 12.5](http://koufuku.jp/cdn/shop/files/2000000093635_3.jpg?v=1765159206&width=480)
![[Pre-owned] PT900 Unheated Sapphire Ring, S1.712ct D1.39ct, with GRJ appraisal report, 18.5g, size 13.5](http://koufuku.jp/cdn/shop/files/2000000018515_3.jpg?v=1765159207&width=480)
![[Pre-owned] PT900 ALEXANDRITE Ring A0.31ct D0.46ct 5.2g #8](http://koufuku.jp/cdn/shop/files/2000000015408_2.jpg?v=1765159205&width=480)
![[Pre-owned] K18WG Ruby Ring R10.05ct D2.23ct 14.4g #13.5](http://koufuku.jp/cdn/shop/files/2000000045122_2.jpg?v=1765159208&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] 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)