A mini boulder opal specimen. 65 carats / 13 grams 22.8 x 22 mm / 0.89" x 0.86". 16.6 mm / 0.65" thick. Natural solid boulder opal specimen. Mined by...
A small boulder opal specimen. 60 carats / 21 grams 33.8 x 17.7 mm / 1.33" x 0.69". 24.1 mm / 0.94" thick. Natural solid boulder opal specimen. Mined by...
A small boulder opal specimen. 125 carats / 25 grams 42.6 x 23 mm / 1.67" x 0.90". 15.2 mm / 0.59" thick. Natural solid boulder opal specimen. Mined by...
A small boulder opal specimen. 105 carats / 21 grams 37.3 x 22.3 mm / 1.46" x 0.87". 16 mm / 0.62" thick. Natural solid boulder opal specimen. Mined by...
A small boulder opal specimen. 105 carats / 21 grams 31 x 26 mm / 1.22" x 1.02". 19.5 mm / 0.76" thick. Natural solid boulder opal specimen. Mined by...
A small boulder opal specimen. 105 carats / 21 grams 36 x 32.7 mm / 1.41" x 1.28". 18 mm / 0.70" thick. Natural solid boulder opal specimen. Mined by...
A small curvy rainbow boulder opal specimen. 120 carats / 24 grams 48 x 21.7 mm / 1.88" x 0.85". 20.6 mm / 0.81" thick. Natural solid boulder opal specimen....
A small green-blue boulder opal specimen. 95 carats / 19 grams 26.5 x 27 mm / 1.04" x 1.06". 19.6 mm / 0.77" thick. Natural solid boulder opal specimen. Mined...
