This infographic is designed by Opals To You.

Welcome to the world famous Lightning Ridge, located in New South Wales, Australia, and home to the largest production of Natural Solid Black Opal. It has a very special place in our hearts, as this opal mining region has been home to our family mining operation for the last two generations. With over 35 years of opal mining experience we continue to deliver one of the rarest gemstones in the world.

Source: Australian Opals Online