Solid Black Opals
Only found in the Lightning Ridge area in the far north-northwest of New South Wales. It is the world’s rarest, most valuable, brilliant and stunning opal of them all. A layer of opal, like a band of colour, sits on a naturally occurring dark backing. It is from the colour of the backing that Black Opal gets its name. This dark background known as potch, ranges in colour from light grey through to midnight black.
Lightning Ridge Opal Mines
https://opals.net.au/