Australian black opal is the most prized and most valuable type of precious opal. It has vibrant colours superimposed on a dark or black background. This opal was purchased from famous Sydney jeweller, Percy Marks, in 1976 as part of a group of very fine precious opal gems.
This example is a polished oval cabochon with predominant green and blue flashes in a pattern called ‘harlequin’, which has colour patches of rectangular or diamond shapes on a dark background. New South Wales declared the black opal its gemstone emblem in 2008.
Lightning Ridge, New South Wales, Australia
1.3 x 1.7 x 0.3 cm, 2.98 carats
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