Black Opal
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Physical & Optical Properties
Mohs Hardness
Crystal System
Value & Market
Where to Buy Black Opal
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About Black Opal
Black opal is the most valuable and coveted variety of precious opal, distinguished by its dark body tone—ranging from dark gray to jet black—which dramatically intensifies the spectral play-of-color that dances across its surface. The world's premier source is Lightning Ridge in New South Wales, Australia, which produces the finest stones displaying vivid red, green, blue, and purple fire on a near-black background. A top-grade black opal from Lightning Ridge can exceed the per-carat value of diamond.