Loose Black Opal Stones For Sale
Black opal is by far the rarest, most expensive and highly sought after type of opal. The only place in the world where it comes from is Lightning Ridge, NSW, Australia. It is important to look for stones that have a very black base and a bright play of color. The most common colors found on this type of opal are the blue or purple. The rarest and most expensive stones have lots of red colour.