amorphaus
area
australia
chrystal
chrystals
community
coober pedy
earth
earthhills
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
sandhill
silica
south
stuart highway
town
value
wildfire
xeric