A free-form boulder opal with rainbow colours on a light background / body tone. It looks like an artists palette! 15.08 carats. 27.1 x 16.4 mm / 1.06 x 0.64"....
A lovely long oval boulder opal with pale greens and oranges on a lighter body tone / background. 14.41 carats. 28.2 x 10 mm / 1.11" x 0.39". 5.1 mm...
A beautiful free-form boulder opal with rainbow colours on a lighter body tone / background. 8.17 carats. 24 x 7 mm / 0.94" x 0.27". 5 mm / 0.19" thick....
A small triangle boulder opal with lovely greens and blues. 4.28 carats. 19 x 9.9 mm / 0.74 x 0.38". 3 mm / 0.11" thick. Natural solid boulder opal. Mined...
A rectangle boulder opal with some fun pinks. 4.34 carats. 11.8 x 9.6 mm / 0.46 x 0.37". 3.4 mm / 0.13" thick. Natural solid boulder opal. Mined by Sue...
A rectangle boulder opal with some fun colours. 4.82 carats. 14.4 x 8.6 mm / 0.56 x 0.33". 3.6 mm / 0.14" thick. Natural solid boulder opal. Mined by Sue...
A small boulder opal with some lovely rainbow colours. 4.43 carats. 19 x 7 mm / 0.74 x 0.27". 3.2 mm / 0.12" thick. Natural solid boulder opal. Mined by...
