Slate green-blue and crystal lilac opal formation on main face. Additional slate blue-green deposit on opposite surface. Traces of potential additional seams to explore. Perfect for lapidary slicing, grinding and polishing practice. Try cutting to some artisan stones or keep as a specimen. High density ironstone host rock mined at Winton opal fields. Weight approximately 144 grams Dimensions approximately 6 x 4 x 4 cm Some photos in outdoor daylight, dry as-mined condition. Some photos wet to simulate polishing potential of the opal.
