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Fire Obsidian

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A variety of Obsidian

An iridescent variety of obsidian. Its 'fire' is caused by thin layers of microcrystals of magnetite (which are approximately the thickness of a wavelength of light). The colour of Rainbow Obsidian occurs from a much thicker volume of the specimen (Nadin, 2007).

Classification of Fire Obsidian

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Other Names for Fire Obsidian

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Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Fire Obsidian

Reference List:

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Ma, Chi, Rossman, George R. and Miller, James A. (2007): The origin of color in "Fire" Obsidian. The Canadian Mineralogist 45, 551-557.

Nadin, E. (2007): The secret lives of minerals. Engineering & Science, No. 1, 10-20.

Internet Links for Fire Obsidian

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  • Localities for Fire Obsidian

    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    • Oregon
      • Lake Co.
    The Canadian Mineralogist Vol. 45, pp. 551-557
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