Collection of five chunks and slices of rough boulder opal. Variety of opal features include surface formations and veins. Opal colours range from greens, purples, blues and glassy black. Distinctive wood like grains and patterns in the host material. This rock set is just right for lapidary cutting, grinding and polishing. Make numerous finished geometric and artistic finished stones. Ironstone and sandstone host rock mined at Winton opal fields. Mine Area: Central West Queensland, Australia. Total weight approximately 357 grams. Average dimensions for each piece approx. 7 x 4 x 2 cm. Some photos in outdoor daylight, as-mined dry condition. Some photos wet to simulate polishing potential of the opal.
