The potential of a boulder to yield valuable opal often remains shrouded in mystery until the very end.

This display, while conveying obvious opal, is understood only through the lens of hindsight.

The notorious boulder opal, presents a formidable challenge to even the most skilled miners and cutters.

A testament to this is the countless boulder opals rendered worthless by mere fractions of mis-judgment in cutting. The margin for error is non-existent, making the art of opal extraction both risky and exhilarating.