Opal - A colourful precious mineral, South Australia - The state in which Coober Pedy is located, Mining - The action of subtracting minerals, tunnels - An underground passage used for mining, Environment - The surroundings in which an organism operates, Explosives - Explosive chemicals used for mining, Jewellery - Something you wear around your neck, wrist, or finger, License - A permit to do something, Sedimentary rock - formed from pre-existing rocks or pieces of organisms,

Coober Pedy Opal Mine Guess the letters

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