Natural boulder opal split pair of pre-form rubs. Brilliant patterns of purples, blues and greens. Cut on saw from rough boulder opal rock and split on colour bar. Approx. total weight 9.1 grams Approx. max. dimensions (1) 27 x 14 x 5 (2) 27 x 15 x 5 mm Mined in Winton area of central Queensland, Australia. Photo taken under indoor white light.
