A small rectangle boulder opal with strong green-blues on a dark background / body tone. 2.30 carats. 13.4 x 5.2 mm / 0.52 x 0.20". 3 mm / 0.11" thick....
A large rectangle picture stone boulder opal with very bright greens, oranges and reds. 33.58 carats. 28.7 x 18.8 mm / 1.12 x 0.74". 6.3 mm / 0.24" thick. Natural...
A geometric boulder opal with strong blue and greens stripes on a black background / body tone. One of our favourites! 7.75 carats. 24.7 x 11.1 mm / 0.97" x...
A beautiful extra small free-form boulder opal with strong colours and a black body tone / background. 1.48 carats. 11.1 x 5.1 mm / 0.43" x 0.20". 2.6 mm /...
A beautiful oval boulder opal with brilliant green-blues on a dark background / body tone. 11.20 carats. 23.8 x 12.9 mm / 0.93" x 0.50". 3.1 mm / 0.12" thick....
A beautiful free-form boulder opal with brilliant colours on a dark background / body tone. 14.50 carats. 25 x 14 mm / 0.98" x 0.55". 5 mm / 0.19" thick....
A large free-form boulder opal with brilliant rainbow colours. 20.15 carats. 28 x 14 mm / 1.10 x 0.55". 3 mm / 0.11" thick. Natural solid boulder opal. Mined by...
A large oval boulder opal with brilliant rainbow colours. 23.91 carats. 31.7 x 15.1 mm / 1.24 x 0.59". 5.1 mm / 0.20" thick. Natural solid boulder opal. Mined by...
