Item Details Dimensions (mm) : 21.200 x 5.300 x 2.900 mm Weight (cts) : 3.400 Free hole drilling offered. (If I feel it is safe to do so) Please note: All sizes and weights are approximate as not all scales are made the same. Stone : Boulder Opal Outback Queensland Australia Cut and Polished Natural untreated Multicoloured beauty 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!!!!