Showing 1288 products
![[Pre-owned] PT900 Alexandrite Ring, A0.73ct, D0.33ct, with Gem Research Japan Sorting, #11](http://koufuku.jp/cdn/shop/files/2000000021812_3.jpg?v=1760667250&width=480)
![[Used] PT900 Diamond Ring 0.613ct F SI2 Good Central Gem Laboratory Sorting 4.5g #11](http://koufuku.jp/cdn/shop/files/2000000012544_3.jpg?v=1750143322&width=480)
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![[Pre-owned] PT900 Treated Blue & Colorless Diamond Ring, TB0.63ct, D1.56ct, 13.1g, #10](http://koufuku.jp/cdn/shop/files/2000000010113_2.jpg?v=1750401687&width=480)
![[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 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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![[Used] Pt900 Ruby Ring D0.15ct R0.17ct 10.2g #10.5](http://koufuku.jp/cdn/shop/files/13473_01_4ee0628a-3bc2-41b9-a004-efce4cc98be0.jpg?v=1743141413&width=480)
![[Used] PT900 Ruby Ring R0.52ct D0.51ct #8 5.5g](http://koufuku.jp/cdn/shop/files/70933_01.jpg?v=1751706081&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/K18YG DIAMOND RING Diamond Ring D1.035ct 7.3g #12](http://koufuku.jp/cdn/shop/files/2000000047843_2.jpg?v=1768444653&width=480)
![[Used] PT900/K18YG DIAMOND RING Diamond Ring D3.00ct 13.8g #12](http://koufuku.jp/cdn/shop/files/2000000072821_2.jpg?v=1768882395&width=480)
![[Pre-owned] PT900/K18YG DIAMOND RING D0.59ct 8.1g #8.5](http://koufuku.jp/cdn/shop/files/2000000126609_2.jpg?v=1767586002&width=480)
![[Used] PT900/K18YG DIAMOND Ring 0.426ct 3.1g #7](http://koufuku.jp/cdn/shop/files/2000000099286_2.jpg?v=1765877331&width=480)
![[Pre-owned] PT900/K18YG Emerald Ring Emerald 1.97ct D0.17ct 9.8g #16](http://koufuku.jp/cdn/shop/files/2000000037479_2.jpg?v=1766824686&width=480)
![[Pre-owned] PT900/K18YG ONYX Ring, D0.44, Certificate of Authenticity, 13.8g, #12](http://koufuku.jp/cdn/shop/files/2000000025896_3.jpg?v=1766801414&width=480)
![[Pre-owned] PT900/K18YG RUBY RING Ruby Ring R1.16ct D1.64ct 8.0g #8](http://koufuku.jp/cdn/shop/files/2000000043456_2.jpg?v=1768444828&width=480)
![[Used] PT900/K18YG Garnet Ring 3.5g #7](http://koufuku.jp/cdn/shop/files/2000000037677_2.jpg?v=1760667270&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 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)
