Stone size: Approximately 8mm Inner diameter: Approximately 16.5cm This is Auralite, rich in rare cacoxenite. Please examine the photos carefully and make your decision. Immediate purchase is welcome, even for items currently under negotiation. If you wish to negotiate a price, please state your desired amount in the comment section first (⁠ꈍ⁠ᴗ⁠ꈍ⁠) Thank you.