Lightning Ridge, New South Wales Lightning Ridge is a town famous for the rich and rare black opal that is found there. When Black opal was first discovered in Lightning Ridge in the late 1880's people didn't realise the potential commercial value that Black Opal had. In fact it wasn't until some 20 to 30 years later in the early 1900's that buyers started realising its value. Some of the traditional fields around Lightning Ridge include the Three Mile and Thorleys Six Mile. How Black Opal gets its name is from the colour of the 'nobbies' in which the black opal is found. The 'nobbies' or r...