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Black Onyx

Black Onyx

5 total reviews

    Onyx is a banded variety of the mineral chalcedony. It is formed from deposits of silica in water filtering through fissures in other rocks. Onyx and agate are both formed this way, but are classified by their bands: agate’s bands are curved while onyx has parallel bands across its surface.

    These bands gave onyx its name. The light shade of the band across the stone reminded ancient Greeks of a fingernail, hence “onyx” coming from the Greek word “onux” or “claw.”


    • While black onyx is the most well-known variety of onyx, it is not the most common to occur naturally. In fact, most black onyx commercially available is artificially dyed by soaking or boiling and applying a chemical treatment. Your specimen has not been artifically colored.


    • Onyx has been used for decoration throughout history. Legend has it that Cleopatra wore black onyx as a protection charm, claiming that the mineral would vibrate when she was near her enemies.
    • Add this sample to your geology collection.


    This is a listing for one lb of black onyx specimens. Please note that you will receive a specimen similar to the images shown. Size ranges from .5" to 2". 

      Regular price $7.00
      Regular price $10.00 Sale price $7.00
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      Collections containing this item: Geology | Rocks, Crystals, & Minerals |

      Customer Reviews

      Based on 5 reviews
      A.K. (Virginia, United States)

      Amy gave this item 5 stars

      E.D. (Virginia, United States)

      Erin gave this item 5 stars

      J.S. (Virginia, United States)

      Jyuce gave this item 5 stars


      The specimen was packaged very well, and was shipped incredibly quickly. It is a bit on the smaller side, but I knew at the time of purchase that this was a possibility (sometimes you just get a smaller rock/mineral).

      V. (Missouri, United States)
      Nice specimens

      Nice specimens to add to our rock collections.


      We only list verified authentic items. We work with reputable collectors, and regularly consult with our network of scientists and experts.

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