Gems, Jewelry, and Precious Metals
Showing 1929 products
![[Pre-owned] PT900 Diamond Ring D0.27ct 9.1g #19](http://koufuku.jp/cdn/shop/files/2000000007199_2.jpg?v=1766219043&width=480)
![[Pre-owned] PT900 DIAMOND Men's Ring D0.43ct 18.9g #17](http://koufuku.jp/cdn/shop/files/2000000106366_2.jpg?v=1766219043&width=480)
![[Pre-owned] K18YG Sapphire Purple Sapphire Ring PS0.41ct D0.43ct CGL Sorting 6.9g #11.5](http://koufuku.jp/cdn/shop/files/2000000108506_3.jpg?v=1766219043&width=480)
![[Pre-owned] K18YG/PT900 WHITE OPAL Ring OP1.09ct D0.28ct 7.7g #14](http://koufuku.jp/cdn/shop/files/2000000037905_2.jpg?v=1766219054&width=480)
![[Pre-owned] PT900 JADEITE Ring D0.35ct 6.5g #8.5](http://koufuku.jp/cdn/shop/files/2000000016665_2_4d7e3832-8d06-4d3f-9ee2-bd8a07e79e26.jpg?v=1766219119&width=480)
![[Pre-owned] PT900 Diamond Ring D0.44ct 15.1g #14](http://koufuku.jp/cdn/shop/files/2000000124421_2.jpg?v=1766219119&width=480)
![[Pre-owned] PT900 Black Opal Ring BO3.45ct D0.62ct 4.7g #16.5](http://koufuku.jp/cdn/shop/files/2000000018195_2.jpg?v=1766219128&width=480)
![[Pre-owned] K18WG Black Opal Ring BO3.80ct D0.58ct 5.4g #12](http://koufuku.jp/cdn/shop/files/2000000069890_2.jpg?v=1766219128&width=480)
![[Pre-owned] K18WG Mozambican Unheated Ruby Ring R3.02ct D1.36ct with GRS Certificate, 6.7g, Size 12.5](http://koufuku.jp/cdn/shop/files/2000000092713_3.jpg?v=1766221258&width=480)
![[Pre-owned] PT900 RUBY RING R0.56ct D0.08ct 4.9g #11](http://koufuku.jp/cdn/shop/files/2000000117423_2.jpg?v=1766221258&width=480)
![[Pre-owned] K18WG Diamond Ring D1.95ct 7.1g #12](http://koufuku.jp/cdn/shop/files/2000000039015_2.jpg?v=1766221258&width=480)
![[Pre-owned] SHOW YAMAGATA 18K White Gold Diamond Ring, D0.25ct, with Certificate of Authenticity, 9.9g, Size 17](http://koufuku.jp/cdn/shop/files/2000000040981_2.jpg?v=1766221259&width=480)
SHOW YAMAGATA
[Pre-owned] SHOW YAMAGATA 18K White Gold Diamond Ring, D0.25ct, with Certif[...]
$1,802.00
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![[Pre-owned] K18PG DIAMOND RING D0.05ct 6.4g #16.5](http://koufuku.jp/cdn/shop/files/2000000112466_2.jpg?v=1766221259&width=480)
![[Pre-owned] PT900 EMERALD RING E2.10ct D0.50ct D0.20ct 7.5g #8.5](http://koufuku.jp/cdn/shop/files/2000000127002_2.jpg?v=1766801414&width=480)
![[Pre-owned] PT900 EMERALD RING E0.93ct D0.76ct CGL Sorting 5.9g #13 Hand made](http://koufuku.jp/cdn/shop/files/2000000125916_3.jpg?v=1766801414&width=480)
![[Pre-owned] PT900 STAR SAPPHIRE RING SS3.84ct D1.92ct CGL Sorting 9.9g #11.5 Hand Made](http://koufuku.jp/cdn/shop/files/2000000124896_3.jpg?v=1766801414&width=480)
![[Used] K18WG EMERALD RING with emeralds E2.23ct D0.53ct 4.8g #13.5](http://koufuku.jp/cdn/shop/files/2000000041827_2.jpg?v=1766801414&width=480)
![[Pre-owned] K18YG/PT900 EMERALD RING E0.60ct D0.38ct with GGS Sorting, 17.2g, Size 15.5](http://koufuku.jp/cdn/shop/files/2000000124933_3.jpg?v=1766801414&width=480)
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![[Pre-owned] PT900 Sapphire Ring, S2.564ct, D0.86ct, with CGL Appraisal, 15.0g, Size 13](http://koufuku.jp/cdn/shop/files/2000000016597_2.jpg?v=1766801414&width=480)
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![[Pre-owned] PT900 RUBY Ring, R2.32ct D0.70ct, with CGL Sorting, 6.2g, Size 11](http://koufuku.jp/cdn/shop/files/2000000102146_3.jpg?v=1766801414&width=480)
![[Pre-owned] K18WG Black Opal Ring BO1.72ct D0.17ct 3.6g](http://koufuku.jp/cdn/shop/files/2000000036595_2.jpg?v=1766801414&width=480)
![[Pre-owned] PT850 EMERALD RING E0.56ct D0.58ct 4.9g #10.5](http://koufuku.jp/cdn/shop/files/2000000126081_2.jpg?v=1766801414&width=480)
![[Used] K18WG SAPPHIRE PENDANT NECKLACE Color Sapphire Pendant Necklace S10.80ct D0.12ct Sorting 11.0g](http://koufuku.jp/cdn/shop/files/2000000106946_2.jpg?v=1766801414&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)
