Item Details Dimensions (mm) 20.00 x 13.30 x 3.60 Weight (carats) 8.65 Free hole drilling offered. (If safe to do so) Please note: All sizes and weights are approximate as not all scales are made the same. Stone : Boulder Opal Mine : Winton Outback Queensland Australia Natural untreated Cut and Polished Solid Stone This beauty is ready to be set in jewellery Member of the " Queensland Boulder Opal Association " Member of the " Lightning Ridge Miners Association " We aim to provide 100% Customer Satisfaction!!