Aesthetic specimen of opal with notable bluish iridescences in a very fine-grained sandstone matrix. From Quilpie area, a locality with an economy based on the grazing and mining industries. The area has one of the largest deposits of boulder opal in the world. A gem...

A classic banded opal from Australia, with violet, green, blue colors. With a good exposed surface showing opalescence. It comes from the A. Trigo collection.