A lovely small pastel stripe free-form boulder opal. 4.70 carats. 15.8 x 10.3 mm. 4.1 mm thick. Natural solid boulder opal. Mined by Sue at her Mt. Margaret opal mine...
A bright green-blue rectangle boulder opal. 3.09 carats. 12.3 x 7.6 mm. 3.6 mm thick. Natural solid boulder opal. Mined by Sue at her Yaraka opal mine in Queensland, Australia....
A fun, small striped boulder opal. 5.09 carats. 17.5 x 10.6 mm. 3.1 mm thick. Natural solid boulder opal. Mined by Sue at her Yaraka opal mine in Queensland, Australia....
A teardrop boulder opal with a green and purple rolling flash. 4.33 carats. 17.8 x 10.6 mm. 3.2 mm thick. Natural solid boulder opal. Mined by Sue at her Yaraka...
An interesting green-blue matrix boulder opal. 9.82 carats. 22 x 16.3 mm. 3.9 mm thick. Natural solid boulder opal. Mined by Sue at her Yaraka opal mine in Queensland, Australia....
An interesting free-form boulder opal. 10.47 carats. 20 x 15 mm. 4.1 mm thick. Natural solid boulder opal. Mined by Sue at her Yaraka opal mine in Queensland, Australia. Lower...
A rare and unusual rainbow shimmer heart shaped boulder opal. 10.11 carats. ~17.6 x 17.5 mm. 3.7 mm thick. Natural solid boulder opal. Mined by Sue at her Yaraka opal...
An unusual pair of swirly green-blue and white heart shaped boulder opals. 23.93 carats (total). ~ 19.6 x 20 mm. ~ 3.5 mm. Natural solid boulder opal. Mined by Sue...
