Yowah, Queensland, Australia A boulder opal "split" of an opalized wood replacement in which the two polished halves appear to depict the sacred mountain of Japan, "Mount Fuji", with extensive veining of blue and green opal in brown ironstone matrix. Weighing approximately 2713.0 and 2246.0 carats and measuring 3 1/4 x 2 x 3 in and 3 1/4 x 2 3/4 x 1 1/2 in (2)