Gems, Jewelry, and Precious Metals
Showing 1929 products
![[Pre-owned] K18YG Ruby Ring R3.00ct D1.19ct with CGL Sorting, 7.8g, Size 14](http://koufuku.jp/cdn/shop/files/2000000029306_2.jpg?v=1768444692&width=480)
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![[Pre-owned] K18WG Myanmar Ruby Ring, 1.29ct, D1.88ct, Pigeon Blood, AIGS Certified, 7.0g, Size 13](http://koufuku.jp/cdn/shop/files/2000000069371_4.jpg?v=1768444692&width=480)
![[Pre-owned] K18WG Myanmar Ruby Ring, Burmese Ruby R1.02ct D2.97ct Pigeon Blood, AIGS Certified, 9.7g, Size 14](http://koufuku.jp/cdn/shop/files/2000000041384_3.jpg?v=1768444692&width=480)
![[Pre-owned] K18WG/YG NO HEAT RUBY RING Mozambique Origin Unheated Ruby Ring R3.03ct D1.20ct AIGS Pigeon Blood Gemological Report 8.0g #14.5](http://koufuku.jp/cdn/shop/files/2000000071800_4.jpg?v=1768444692&width=480)
![[Pre-owned] PT900 STAR SAPPHIRE RING SS1.11ct D1.02ct 8.5g #11.5](http://koufuku.jp/cdn/shop/files/2000000007755_2.jpg?v=1768444693&width=480)
![[Pre-owned] PT900 SAPPHIRE RING Sapphire 10.633ct Diamond 2.503ct 14.5g #13](http://koufuku.jp/cdn/shop/files/2000000081915_2.jpg?v=1768444692&width=480)
![[Pre-owned] K18WG Sapphire Ring, Sri Lankan Sapphire 4.08ct, Diamond 0.96ct, with GRS Certificate, 7.2g, Size 14](http://koufuku.jp/cdn/shop/files/2000000048406_3.jpg?v=1768444692&width=480)
![[Pre-owned] Shunichi Tamura K18/K18WG Diamond Pendant/Brooch D0.08ct 19.9g](http://koufuku.jp/cdn/shop/files/2000000114750_2.jpg?v=1768444692&width=480)
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![[Used] K18WG TAHITIAN PEARL BROOCH Tahitian Pearl Pendant Brooch P10.0 - 10.5mm D0.53ct 35.3g](http://koufuku.jp/cdn/shop/files/2000000049137_2.jpg?v=1768444693&width=480)
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![[Pre-owned] K18WG Burmese Ruby Ring, R1.41ct D1.40ct, Pigeon Blood, AIGS Appraisal, 7.1g, Size #13](http://koufuku.jp/cdn/shop/files/2000000041414_3.jpg?v=1768444693&width=480)
![[Pre-owned] K18WG NO HEAT RUBY RING Mozambique Untreated Ruby Ring R2.28ct D0.71ct GRS Certified 4.1g #12.5](http://koufuku.jp/cdn/shop/files/2000000012612_3.jpg?v=1768444692&width=480)
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![[Pre-owned] Mitsuo Kaji K18/K18WG PENDANT Top D0.33ct 37.4g](http://koufuku.jp/cdn/shop/files/2000000012599_2.jpg?v=1768444693&width=480)
![[Pre-owned] PT900 SAPPHIRE RING S6.85ct D1.91ct CGL Sorting 15.4g #12](http://koufuku.jp/cdn/shop/files/2000000001159_3.jpg?v=1768444693&width=480)
![[Pre-owned] PT950 NO HEAT RUBY RING Mozambique-origin Unheated Ruby Ring R6.04ct D2.45ct GRS Certified 12.6g #12.5](http://koufuku.jp/cdn/shop/files/2000000018454_3.jpg?v=1768444693&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] PT900 STAR SAPPHIRE RING SS38.18ct D0.18ct with GRJ Sorting, 15.5g, Size 12.5](http://koufuku.jp/cdn/shop/files/2000000000688_3.jpg?v=1768444693&width=480)
![[Pre-owned] K18YG MEXICO OPAL Fire Opal Ring OP2.44ct D0.38ct with Appraisal, 11g, Size #12](http://koufuku.jp/cdn/shop/files/2000000064031_3.jpg?v=1768444693&width=480)
![[Pre-owned] K18WG NO HEAT RUBY RING Mozambique Untreated Ruby Ring R2.06ct D0.59ct GRS Certified 5.5g #13](http://koufuku.jp/cdn/shop/files/2000000089249_3.jpg?v=1768444693&width=480)
![[Pre-owned] PT900 AKOYA PEARL OBIDOME, Akoya Pearl 7.0mm, D0.06ct, 17.9g](http://koufuku.jp/cdn/shop/files/2000000003986_2.jpg?v=1768444693&width=480)
![[Pre-owned] K18YG SAPPHIRE RING S4.54ct S0.53ct D0.40ct 8.7g #13](http://koufuku.jp/cdn/shop/files/2000000068893_2.jpg?v=1768444693&width=480)
![[Pre-owned] K18WG SAPPHIRE RING Sri Lankan Sapphire Ring S7.82ct D0.59ct with GRS Certificate, 6.6g, Size #12.5](http://koufuku.jp/cdn/shop/files/2000000043258_4.jpg?v=1768444693&width=480)
![[Used] K18YG PEARL BROOCH Baroque Pearl Brooch 35.5g](http://koufuku.jp/cdn/shop/files/2000000073194_2.jpg?v=1768444693&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)