This is a diamond and platinum necklace. I purchased it 5 years ago at Jewelry Tsutsumi for 300,000 yen. Diamond AGT Gem Laboratory certified Color = K color Clarity = I1 This is a high-quality piece of jewelry adorned with fine diamonds. The large single diamond has a stunning presence. Perfect for graduation, entrance ceremonies, or other special occasions. I have only used it a few times since purchasing it. Quality Diamond setting: pt900 Lot No. and ct number are engraved on the back of the setting. Diamond: 0.523ct The gemstone is natural. Chain: pt850, Length 40cm Weight: Approximately 2.43g Diamond size: Diameter 0.504cm Round brilliant cut Certificate of authenticity included No case *Please check the photos for details. *Professionally cleaned. Returns and exchanges are not accepted, so please consider your purchase carefully. #Necklace #Diamond #Platinum #CertificateOfAuthenticity #Women's #Accessories #Jewelry #Gift #Genuine #Natural #Gemstone #Tsutsumi Material: Platinum Decoration: Diamond