This ring comes with an appraisal certificate from the Central Gemological Laboratory of Japan, the most trusted gemological laboratory in Japan. It's a rare, approximately 1ct, large Brazilian Paraiba tourmaline ring. It's a beautiful, pre-owned item, used only a few times. Gemstone: Paraiba tourmaline 0.99ct Diamond 0.30ct Material: Pt900 Weight: 6.3g Ring Size: Size 12 Accessories: Central Gemological Laboratory appraisal certificate, used case I will not respond to price reductions without a specified amount. Thank you for your understanding.