McAfee SECURE sites help keep you safe from identity theft, credit card fraud, spyware, spam, viruses and online scams

Home » Gemstones » Opal » Black Opal

Black Opal: Also Known as Dark Opal


Pictures and video of black opals



What is Black Opal?



"Black opal" is a term used for opal that has a dark body color, often black or dark gray. The term is also used for opal that has a dark blue or dark green body color.

The dark body color often makes the fire of black opal more obvious. This contrast of fire color to body color makes black opals very desirable and sold for high prices.

One of the specimens at right is a solid black opal with a strong blue face-up color play. It was mined at Lightning Ridge, Australia, the "Black Opal Capital of the World". It is 2.46 carats in weight and 9.5 x 12.5 millimeters in size.

The other specimen is a black matrix opal cut from material mined at Andamooka, South Australia. It is a cabochon of about 30 carats.








Find it on Geology.com




More from Geology.com


Uses of granite
Uses of Granite: The rock used everywhere from the kitchen to the facing stone of skyscrapers.
jet
Jet is a black organic gem material that forms from well-preserved woody material.
Scoria
Scoria is a dark-colored, extrusive igneous rock with abundant vesicles.
The Acid Test
The Acid Test: Geologists use dilute hydrochloric acid to identify carbonate minerals.
city satellite images
What City is This? Can you recognize United States cities from satellite images?
Eagle Ford Shale
Eagle Ford Shale: One of the most prolific producers of oil and gas in the United States.
Find Minerals & Gems: Dozens of sites where you can dig and keep what you find.
Plate Tectonics
Plate Tectonics: Articles and maps about plate tectonics and the interior of Earth.


Black Opal
A solid black opal cabochone with a strong blue face-up color play. It was mined at Lightning Ridge, Australia, the "Black Opal Capital of the World". It is 2.46 carats in weight and 9.5 x 12.5 millimeters in size.




Andamooka black matrix opal
A black matrix opal cut from material mined at Andamooka, South Australia. It is a cabochon of about 30 carats.


More Gemstones
  100+ Gems
  Strontium Titanate
  Emerald
  Ant Hill Garnets
  Extraterrestrial Gems
  Ruby and Sapphire
  Pictures of Opal
  Diamond

© 2005-2015 Geology.com. All Rights Reserved.
Images, code and content of this website are property of Geology.com. Use without permission is prohibited. Pages on this site are protected by Copyscape.