A small, free-form boulder opal. 4.69 carats. 15.9 x 9.6mm. 2.6 mm thick. Natural solid boulder opal. Mined by Sue at her Yaraka opal mine in Queensland, Australia. Commercial grade....
A small light pink and purple boulder opal. 3.91 carats. 12.2 x 10.3 mm. 2.7 mm thick. Natural solid boulder opal. Mined by Sue at her Yaraka opal mine in...
A small rectangle pastel boulder opal pair. 6.48 carats (total). ~ 10.5 x 8.9 mm / 0.41" x 0.35". ~ 2.7 mm / 0.10" thick. Natural solid boulder opal. Mined...
A lovely small rainbow boulder opal pair. 3.83 carats (total). ~ 11.6 x 7.0 mm / 0.45" x 0.27". ~ 2.8 mm / 0.11" thick. Natural solid boulder opal. Mined...
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 /...
