A pair long oval boulder opals with bright rainbow colours on a lilac-hued, dark background / body tone. 8.59 carats (total). ~ 21.5 x 7.3 mm / 0.84" x 0.28"....
A lovely green-blue rectangle pair of boulder opals. 8.21 carats (total). ~ 14.1 x 9 mm / 0.55" x 0.35". ~ 3 mm / 0.11" thick. Natural solid boulder opal....
A fantastic rectangle boulder opals with rainbow colours on an interesting caramel-hued, light body tone / background. 14.38 carats (total). 1.51 (L) and 1.36 grams (R). ~ 24 x 9...
A wonderful green-blue boulder opal with a black background / body tone and white tips. 2.51 carats. 13.9 x 10.3 mm / 0.54" x 0.40". 2.8 mm / 0.11" thick....
A wonderful green-blue boulder opal pair with a black background / body tone. 2.94 carats (total). ~ 11.2 x 7.9 mm / 0.44" x 0.31". ~ 2.5 mm / 0.09"...
A beautiful half-moon boulder opal with rainbow colours on a lighter body tone / background. 11.73 carats. 30.1 x 9.7 mm / 1.18" x 0.38". 4.9 mm / 0.19" thick....
A stunning boulder opal with brilliant rainbow colours and wonderful movement. 11.76 carats. 21.3 x 13.8 mm / 0.83 x 0.54". 4.4 mm / 0.17" thick. Natural solid boulder opal....
A large boulder opal with bright rainbow colours on lighter background / body tone. 25.08 carats. 28.3 x 15.9 mm / 1.11 x 0.62". 5.2 mm / 0.20" thick. Natural...
