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![[Used] PT900 MEXICO OPAL Mexican Opal Ring D0.471ct 6.9g #11.5](http://koufuku.jp/cdn/shop/files/2000000072067_2.jpg?v=1752392547&width=480)
![[Pre-owned] K18WG CATS EYE Cat's Eye Ring CE2.03ct D0.30ct 3.6g #13](http://koufuku.jp/cdn/shop/files/2000000067629_2.jpg?v=1752392530&width=480)
![[Used] PT900 SAPPHIRE non-heated sapphire ring S6.896ct D0.21ct Central Gem Research Institute identification book 7.3g #11](http://koufuku.jp/cdn/shop/files/2000000068367_3.jpg?v=1752392530&width=480)
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![[Pre-owned] K18WG SAPPHIRE Sapphire Ring, S1.43ct, D0.51ct, 4.2g, #14](http://koufuku.jp/cdn/shop/files/2000000036373_2.jpg?v=1752392529&width=480)
![[Used] PT900 MEXICO OPAL Mexican Opal Ring D1.05ct 11.7g #16](http://koufuku.jp/cdn/shop/files/2000000020433_2.jpg?v=1752392529&width=480)
![[Used] PT900 PERIDOT Ring, P2.31ct, D0.35ct, 8.5g, #12.5](http://koufuku.jp/cdn/shop/files/2000000013701_2.jpg?v=1752392529&width=480)
![[Pre-owned] K18/PT900 Emerald Ring, E1.62ct, D0.67ct, 10.1g, #10.5](http://koufuku.jp/cdn/shop/files/2000000005850_2.jpg?v=1752392528&width=480)
![[Used] PT900 SAPPHIRE Sapphire Ring, S2.14ct, D0.28ct, 5.6g, #15](http://koufuku.jp/cdn/shop/files/2000000016467_2.jpg?v=1752392528&width=480)
![[Pre-owned] PT900 SAPPHIRE RUBY Sapphire and Ruby Ring, S 0.73ct, R 0.40ct, D 0.247ct, 5.5g, #12](http://koufuku.jp/cdn/shop/files/2000000021980_2.jpg?v=1752392527&width=480)
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![[Pre-owned] K18WG No Heat RUBY Unheated Ruby Ring, R0.94ct, D0.32ct, AIGS Pigeon Blood, 2.9g, #13](http://koufuku.jp/cdn/shop/files/2000000035970_3.jpg?v=1752392507&width=480)
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![[Pre-owned] 18K Yellow Gold Ruby Ring, R 0.25ct, D 0.07ct, 2.2g, #8.5](http://koufuku.jp/cdn/shop/files/2000000086033_2.jpg?v=1752392450&width=480)
![[Used] PT900 Diamond Ring D0.77ct D0.30ct 7.3g #13](http://koufuku.jp/cdn/shop/files/2000000086163_2.jpg?v=1752392450&width=480)
![[Pre-owned] 18K Yellow Gold Sapphire Ring, S0.77ct, D0.64ct, 5.3g, #9.5](http://koufuku.jp/cdn/shop/files/2000000087832_2.jpg?v=1752392450&width=480)
![[Used] K18WG SAPPHIRE RING S1.33ct D0.97ct 3.7g #12.5](http://koufuku.jp/cdn/shop/files/2000000103624_2.jpg?v=1752392450&width=480)
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![[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)
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