The most valuable variety of opal, the black opal has a dark body color which beautifully accentuates the play-of-color within the gemstone. Lightning Ridge, Australia is the main source for the widely sought after black opal. Among the rarest gemstones on earth, Lightning Ridge black opals are even rarer than diamonds! The red fire you find in some black opals is an opal miners dream. Only a small percentage of black opals have such fire-red brilliance in color and intensity. Some black opals display a harlequin pattern, a variety that is most exceptional and rare. No other precious stone can match the brilliance of the colors, fire, and pattern of Australian black opals.