Black Opal Gemstones
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Hardness
5.5 - 6.5 on the Mohs scale.
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Occurrence
Australia, former Czechoslovakia, U.S., Brazil, Mexico and southern Africa. Opal and tourmaline are the birthstones of the month of October.
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Appearance
Dark, iridescent, and opalescent with a wide range of internal colors.
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Enhancements
Opal is rarely impregnated with colorless oil, wax and resins.
More information on gemstone enhancements.
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Gemstone Family
Black Opal is a member of the Opal gemstone family.
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0.11 ct., 'AAA' Grade |
5.1x3.0mm Cabochon, Oval Cut |
Medium Dark |
Vivid Orangy Red |
Slightly Translucent |
[N] Not enhanced. |
One of a kind. |
With a play of green, blue and predominant red. |
Black Opal |
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