Purple deposits of opal showing on the main rock surface. Additional purple formation patch on adjacent surface. Traces of potential additional seams to explore. Gnarled rock features with woodgrain-like formations. Suitable as a starter rock for boulder opal cutting practice. Cut to some finished stones or keep as a whole specimen. High density ironstone host rock mined at Winton opal fields. Weight approximately 506 grams Dimensions approximately 11 x 8 x 4 cm Some photos in outdoor daylight, dry as-mined condition. Some photos wet to simulate polishing potential of the opal.
