Boulder opal with very intense green and orange flashes, very brilliant, semi-rough opal.

Boulder opal with large intensely brilliant flashes in the form of a slab of different colors depending on the light incidence: red, orange, green, yellow, blue.

Large free-form boulder opal, white banded with red, green, and yellow.

Large boulder opal with a very intense, highly mobile rainbow fire and gangue outcrops. The surface is polished but slightly irregular.