Boulder Opal Sunset 46

Black, red, yellow, blue and green too.
This image was taken in 1991 during the eruption of Mt. Pinatubo. The skies in the southern hemisphere were filled with ash and dust resulting in spectacular sunsets like this night after night.
This particular image was taken during boulder opal mining activities on the Kyabra boulder opal field, Eromanga region of south western Queensland.