Ключевые слова: amorphaus, area, australia, community, coober pedy, crystal, crystals, earth, earth hills, ecological, ecosystem, extraction valuable, famous, gem, gems, geological, geology, heap, hill, hills, holes, kupi piti, load, materials, mine miners, minerals, mines, molehill, molehills, northern, opal, opals, photogenic, pile, sand, sand hill, silica, south, stuart highway, town, value, wildfire, xeric,