Purchased from Saint-Thierry in Osaka. Comes with a certificate from the Japan Precious Metals Appraisal Association. I found out I'm allergic to metal with a different necklace, so I haven't worn this one, even though I bought it for 300,000 yen ( ; ; ) The small heart is cute. Round Brilliant Cut Pt900 【Color & Clarity】 Diamond Luster 【Size & Weight】 0.30 (stamped) 【Pendant Top Dimensions】 Length: approx. 8mm, Width: approx. 7mm, Thickness: 3mm 【Necklace】 Approx. 45cm, slide type 【Necklace Thickness】 0.8mm 【Clasp】 Spring ring clasp Great value, so immediate purchase is welcome! Thank you!