The discovery of high-quality black opal at Lightning Ridge in New South Wales triggered a unique mining rush. Unlike gold or coal, opal was a gemstone requiring specific conditions, leading to a culture of 'noodlers' (independent prospectors) and small-scale claims. The harsh, dusty environment created an isolated and eccentric mining community.

The opal fields of Australia inspired a distinctive subgenre of 'outback' poetry that celebrates the 'fossicker' (prospector) as a uniquely Australian character—independent, batty, and stoic. The poet Henry Lawson wrote of the 'Sunny South' and the dreamers of the opal fields. The opal itself, with its internal fire and darkness, became a metaphor for the hidden, unstable wealth of the continent, used by poets like Dorothea Mackellar in 'My Country' to represent the 'beauty and terror' of the Australian landscape, a terror intimately linked to the boom-and-bust cycle of mining.