Gems, Jewelry, and Precious Metals
Showing 1929 products
![[Pre-owned] K18WG KUNZITE Pendant Necklace 5.77ct, D0.20ct, 6.7g](http://koufuku.jp/cdn/shop/files/2000000113081_2.jpg?v=1764830276&width=480)
![[Pre-owned] K18WG Mozambique Unheated Ruby Ring, R2.03ct, D0.48ct, with AIGS Pigeon Blood Certificate, 4.5g, Size 12.5](http://koufuku.jp/cdn/shop/files/2000000070667_3.jpg?v=1764830277&width=480)
![[Pre-owned] TASAKI K18WG Tahitian Black Pearl Pendant Necklace 10.3mm 11.0mm D0.27ct 15.8g ONE PRICE](http://koufuku.jp/cdn/shop/files/2000000038162_2.jpg?v=1764830277&width=480)
![[Pre-owned] K18WG Mozambique Unheated Ruby Ring R2.33ct D0.68ct GRS Certified 4.4g #12.5](http://koufuku.jp/cdn/shop/files/2000000043272_3.jpg?v=1764830277&width=480)
![[Pre-owned] 18K Yellow Gold Tourmaline Rubellite (Red Tourmaline) Ring 5.2g #11](http://koufuku.jp/cdn/shop/files/2000000073521_2.jpg?v=1764830303&width=480)
![[Used] PT850/PT900 EMERALD PENDANT NECKLACE Emerald Pendant Necklace D0.47ct 4.7g](http://koufuku.jp/cdn/shop/files/2000000111759_2.jpg?v=1764830303&width=480)
Sold Out
![[Pre-owned] K18WG/YG Unheated Ruby Ring, R2.10ct D1.30ct, with AIGS Pigeon Blood Certificate, 5.3g, #14](http://koufuku.jp/cdn/shop/files/2000000092676_4.jpg?v=1764830303&width=480)
![[Pre-owned] K18WG RUBY Ring R1.16ct D0.15ct 2.6g #13.5](http://koufuku.jp/cdn/shop/files/2000000035987_2.jpg?v=1764830303&width=480)
![[Pre-owned] PT850 EMERALD Pendant Necklace E1.33ct D0.16ct 2.6g](http://koufuku.jp/cdn/shop/files/2000000106519_2.jpg?v=1764830303&width=480)
![[Pre-owned] K18WG Aquamarine Pendant Necklace A0.54ct D0.37ct 5.5g](http://koufuku.jp/cdn/shop/files/2000000058474_2.jpg?v=1764830303&width=480)
![[Pre-owned] K18PG Rose Quartz Pendant Necklace RQ12.33ct D0.56ct 10.7g](http://koufuku.jp/cdn/shop/files/2000000076652_2.jpg?v=1764830345&width=480)
![[Pre-owned] K18WG Heated Ruby Ring, R1.03ct D0.19ct, with AIGS Pigeon Blood Certificate, 3.0g, Size 14](http://koufuku.jp/cdn/shop/files/2000000035925_4.jpg?v=1764830345&width=480)
Sold Out
![[Pre-owned] K18YG Ruby/Diamond Pendant Necklace R0.21ct D0.81ct 7.2g](http://koufuku.jp/cdn/shop/files/2000000058283_2.jpg?v=1764830345&width=480)
![[Pre-owned] K18WG Emerald Cat's Eye Ring EC0.68ct D0.33ct 3.5g #13.5](http://koufuku.jp/cdn/shop/files/2000000003016_2.jpg?v=1764830345&width=480)
![[Pre-owned] K18WG Burmese Ruby Ring R1.05ct D0.50ct with AIGS Pigeon Blood Certificate, 3.0g, Size 14](http://koufuku.jp/cdn/shop/files/2000000047935_4.jpg?v=1764830345&width=480)
![[Pre-owned] K18WG Heated Ruby Ring, R1.18ct D0.53ct, AIGS Pigeon Blood, with Appraisal Certificate, 3.2g, Size 14](http://koufuku.jp/cdn/shop/files/2000000036045_4.jpg?v=1764830345&width=480)
![[Pre-owned] K18YG Ruby Ring R0.96ct D0.70ct 6.7g #12](http://koufuku.jp/cdn/shop/files/2000000040110_2.jpg?v=1764915891&width=480)
![[Pre-owned] K18YG Ruby Ring R0.65ct D0.80ct 7.5g #10](http://koufuku.jp/cdn/shop/files/2000000117508_2.jpg?v=1764915892&width=480)
![Used] K18WG RUBY NECKLACE Untreated Ruby Necklace 1.05ct D0.52ct "Pigeon Blood" AIGS Gemstone Report 3.2g](http://koufuku.jp/cdn/shop/files/2000000050805_4.jpg?v=1764915891&width=480)
![[Pre-owned] K18YG/PT950 Ruby Ring D0.03ct 2.3g](http://koufuku.jp/cdn/shop/files/2000000099453_2.jpg?v=1764915892&width=480)
![[Pre-owned] MIKIMOTO K18WG Akoya Pearl Pendant Necklace, 5.1mm - 5.8mm, 7.6g, ONE PRICE](http://koufuku.jp/cdn/shop/files/2000000016894_2.jpg?v=1764915891&width=480)
Sold Out
![[Pre-owned] K18YG Ruby Ring R0.68ct D0.28ct 5.7g #9.5](http://koufuku.jp/cdn/shop/files/2000000105574_2.jpg?v=1764915892&width=480)
![[Pre-owned] CHAUMET Hortensia K18PG Opal Pendant Necklace 3.9g](http://koufuku.jp/cdn/shop/files/2000000027616_2.jpg?v=1764915891&width=480)
Sold Out
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)