• Hardness

  5.5 - 6.5.

• Occurrence

  Mexico

• 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.

• Mexican Black Opal

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Last updated February 9, 2010
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