Mexican Black Opal Gemstones

  • Hardness

    5.5 - 6.5 on the Mohs scale.

  • Occurrence


  • Appearance

    Extremely dark greenish black, with multi-colored fire.

  • Enhancements

    Mexican black opal is rarely impregnated with colorless oil, wax and resins.

    More information on gemstone enhancements.

  • Gemstone Family

    Mexican Black Opal is a member of the Opal gemstone family.