A free-form boulder opal with brilliant rainbow stripes. 6.77 carats. 24 x 8.7 mm / 0.94 x 0.34". 3.6 mm / 0.14" thick. Natural solid boulder opal. Mined by Sue...
A narrow free-form boulder opal with pastel colours. 11.80 carats. 37.2 x 6.5 mm / 1.46 x 0.25". 5.3 mm / 0.20" thick. Natural solid boulder opal. Mined by Sue...
A free-form boulder opal with multiple colours on a lilac-hued, semi-dark background / body tone. 15.86 carats. 36 x 9.9 mm / 1.41 x 0.38". 4.8 mm / 0.18" thick....
A narrow free-form boulder opal with bright rainbow colours on a lilac-hued, semi-dark background / body tone. 8.03 carats. 29.1 x 7.9 mm / 1.14 x 0.31". 3.6 mm /...
A triangle boulder opal that has two different patterns and multiple colours. 16.97 carats. 21 x 19.5 mm / 0.82 x 0.76". 6.2 mm / 0.24" thick. Natural solid boulder...
A large free-form boulder opal with rainbow colours. 25.51 carats. 28.3 x 21.3 mm / 1.11 x 0.83". 5.5 mm / 0.21" thick. Natural solid boulder opal. Mined by Sue...
A fan-shape boulder opal with bright rainbow colours on a lilac-hued, light background / body tone. 12.71 carats. 20 x 19.2 mm / 1.18 x 0.67". 4.3 mm / 0.18"...
A large oval boulder opal with pin fire rainbow colours on a lilac-hued, light background / body tone. 18.73 carats. 33.8 x 14.2 mm / 1.33" x 0.55". 4.7 mm...
