A small geometric shaped boulder opal with rainbow colours on a semi-dark background / body tone with a purple hue. 2.24 carats. 8.5 x 8.3 mm / 0.33 x 0.32"....
A large teardrop boulder opal with rainbow colours on a darker, lilac-hue background / body tone. 17.82 carats. 24.9 x 14 mm / 0.98 x 0.55". 6.1 mm / 0.24"...
A small geometric shaped boulder opal with rainbow colours on a dark background / body tone with a purple hue. Just gorgeous! 7.75 carats. 14.3 x 12.3 mm / 0.56...
A beautiful triangle boulder opal with rainbow colours on a lighter body tone. 10.57 carats. 19.8 x 15.8 mm / 0.77" x 0.62". 4.8 mm / 0.18" thick. Natural solid...
A teardrop boulder opal with lovely unusual pastel colours. 4.02 carats. 15.3 x 10 mm / 0.60 x 0.39". 3.9 mm / 0.15" thick. Natural solid boulder opal. Mined by...
A small geometric boulder opal with pretty pastel colours. 7.59 carats. 16.9 x 13.5 mm / 0.66 x 0.53". 3.8 mm / 0.14" thick. Natural solid boulder opal. Mined by...
A small rectangle boulder opal with pretty pinks. 3.00 carats. 15.5 x 5.9 mm / 0.61 x 0.23". 3.6 mm / 0.14" thick. Natural solid boulder opal. Mined by Sue...
A large oval boulder opal with bright rainbow colours on a lilac-hued, semi-dark background / body tone. 27.43 carats. 30 x 17.1 mm / 1.18 x 0.67". 4.8 mm /...
