Showing 1419 products
![[Used] PT900 Burmese Ruby Ring R0.99ct D0.60ct #12 4.8g GIA Certificate of Origin](http://koufuku.jp/cdn/shop/files/2000000011691_3.jpg?v=1744949476&width=480)
![[Used] PT900 SAPPHIRE Sapphire Ring S0.37ct D0.30ct 3.4g #8](http://koufuku.jp/cdn/shop/files/2000000066516_2.jpg?v=1744892625&width=480)
![[Used] K18WG GARNET Green Garnet Ring GG0.45ct D0.25ct 5.2g #12](http://koufuku.jp/cdn/shop/files/2000000075143_2.jpg?v=1744892545&width=480)
![[Used] K18 GARNET Green Garnet Ring GG2.08ct D0.50ct 6.4g #12](http://koufuku.jp/cdn/shop/files/2000000070698_2.jpg?v=1744890572&width=480)
![[Pre-owned] K18WG SAPPHIRE Sapphire Ring S1.30ct Mystery Setting 2.9g #16](http://koufuku.jp/cdn/shop/files/2000000031309_2.jpg?v=1750208031&width=480)
![[Used] PT900 SAPPHIRE Sapphire Ring S1.12ct D0.28ct 9.2g #11.5](http://koufuku.jp/cdn/shop/files/2000000018485_2.jpg?v=1744889949&width=480)
![[Used] PT900 RUBY Ruby Ring R1.05ct D0.45ct 6.8g #13 Made in Mozambique Comes with GIA Certificate of Origin](http://koufuku.jp/cdn/shop/files/2000000015392_3.jpg?v=1744859133&width=480)
![[Used] PT900 SAPPHIRE Ring S2.10ct D0.40ct 6.5g #12](http://koufuku.jp/cdn/shop/files/2000000000275_2.jpg?v=1744858472&width=480)
![[Used] PT900/K18 SPINEL Red Spinel Ring RS0.762ct D0.94ct CGL Sorting 7.4g #10.5](http://koufuku.jp/cdn/shop/files/2000000005935_3.jpg?v=1744858305&width=480)
![[Used] PT900 RUBY Ruby Ring R2.525ct D0.72ct #9 7.9g Comes with Central Gem Laboratory sorting](http://koufuku.jp/cdn/shop/files/2000000011943_3.jpg?v=1744858149&width=480)
![[Used] Pt900 Burmese unheated ruby ring R2.09ct D0.80ct GIA certificate of origin included, identification certificate 6.9g #12](http://koufuku.jp/cdn/shop/files/2000000022765_3.jpg?v=1744618053&width=480)
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![[Pre-owned] K18YG Green Tourmaline Ring GT1.464ct 5.2g #14 with Certificate of Authenticity](http://koufuku.jp/cdn/shop/files/2000000043449_3.jpg?v=1750926454&width=480)
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![[Used] JEUNET K18YG Green Garnet Ring GG0.59ct D0.56ct 6.3g #13](http://koufuku.jp/cdn/shop/files/2000000077284_2.jpg?v=1744610913&width=480)
![[Used] KABANA K18YG Shell/Onyx Diamond Ring #12.5 8g](http://koufuku.jp/cdn/shop/files/2000000012100_2.jpg?v=1744548224&width=480)
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![[Used] PT900 EMERALD V-line ring E0.60ct D0.10ct 4.8g #13.5](http://koufuku.jp/cdn/shop/files/2000000064994_8.jpg?v=1743409607&width=480)
![[Used] PT900 Emerald Ring, E0.53ct, D0.68ct, 5.8g](http://koufuku.jp/cdn/shop/files/2000000021850_8.jpg?v=1752729165&width=480)
![[Used] PT900 JADEITE Jadeite Ring J4.49ct D1.75ct 11.0g #11](http://koufuku.jp/cdn/shop/files/2000000020518_8.jpg?v=1743409133&width=480)
![[Used] PT900 CATS EYE Cat's Eye Ring CE1.00ct D0.50ct 5.2g #11](http://koufuku.jp/cdn/shop/files/2000000019109_8.jpg?v=1743408980&width=480)
![[Used] PT900 CATS EYE Ring CE2.23ct D0.47ct 6.9g #20](http://koufuku.jp/cdn/shop/files/2000000018355_8.jpg?v=1743408775&width=480)
![[Used] PT900 CATS EYE Cat's Eye Ring CE1.41ct D0.12ct 5.6g #13](http://koufuku.jp/cdn/shop/files/2000000017679_2.jpg?v=1743408565&width=480)
![[Used] PT900 JADEITE Jadeite Ring J2.044ct D0.486ct 7.5g #16](http://koufuku.jp/cdn/shop/files/2000000016818_8.jpg?v=1748238748&width=480)
![[Used] PT900 jade ring J4.54ct D0.46ct 8.4g#12.5 Identification](http://koufuku.jp/cdn/shop/files/2000000014609_8.jpg?v=1743407785&width=480)
KOUFUKU is an e-commerce site that handles a wide range of products, from jewelry and precious metals to brand bags, brand watches, brand apparel, and tableware. In addition to sales, we also offer a purchase service.
![[Used] PT900 JADEITE Jadeite Ring J1.79ct D0.53ct 5.6g #11](http://koufuku.jp/cdn/shop/files/2000000014456_8.jpg?v=1743407357&width=480)
![[Used] PT900 SAPPHIRE RING Sapphire Ring S2.57ct D1.51ct 14.3g #15](http://koufuku.jp/cdn/shop/files/2000000071954_2.jpg?v=1768882396&width=480)
![[Pre-owned] MIKIMOTO PT950 ALEXANDRITE RING, A 0.42ct, D 0.62ct, 6.1g, #15, ONE PRICE](http://koufuku.jp/cdn/shop/files/2000000123844_3.jpg?v=1768882396&width=480)
