A small geometric matrix boulder opal. 5.10 carats. 14.6 x 14.5 mm / 0.57 x 0.57". 3.4 mm / 0.13" thick. Natural solid boulder opal. Mined by Sue at her...
A small, free-form boulder opal with some fun pink colours. 10.44 carats. 25.4 x 11.5 mm / 1.00 x 0.45". 4.1 mm / 0.16" thick. Natural solid boulder opal. Mined...
A fun green-blue boulder opal with an organic shape. 5.74 carats. 19.5 x 9.4 mm / 0.76 x 0.37". 4.3 mm / 0.16" thick. Natural solid boulder opal. Mined by...
A small slender rectangle boulder opal with some lovely orange and green colours. 2.84 carats. 19.4 x 5.4 mm / 0.76" x 0.21". 2.6 mm / 0.10" thick. Natural solid...
A small boulder opal with some lovely rainbow colours with movement. 7.19 carats. 21.8 x 9.7 mm / 0.85" x 0.38". 4.6 mm / 0.18" thick. Natural solid boulder opal....
A small rectangle boulder opal with some fun purple colours. 3.81 carats. 16.8 x 6.7 mm / 0.66" x 0.26". 3.5 mm / 0.13" thick. Natural solid boulder opal. Mined...
A long slender oval boulder opal with some lovely pastel colours. 3.96 carats. 23 x 6.3 mm / 0.90" x 0.24". 3 mm / 0.11" thick. Natural solid boulder opal....
A small boulder opal with some rainbow stripes. 6.07 carats. 17.2 x 10.6 mm / 0.67" x 0.41". 3.4 mm / 0.13" thick. Natural solid boulder opal. Mined by Sue...
