A curated collection of three blue boulder opal rocks. Rock 1: Large formation of slate blue opal on main face. Rock 2: Deposits of baby blue opal on main surface. Rock 3: Formation of blue and white opal on main face. Nice combination of cutting stones and lapidary practice. Ironstone host rock mined at famous Winton opal fields. Mine Area: Central West Queensland, Australia. Total weight approximately 504 grams. Approximate dimensions of these rough opal rocks are: (1) 7 x 5 x 4 (2) 7 x 5 x 4 (3) 6 x 6 x 3 cm. Some photos in outdoor daylight, as-mined dry condition. Some photos wet to simulate polishing potential of the opal.
