[Jewelry making - Article 00607] - Re: [Orchid] Fire Agate, Cause of Color?

[Gary Bourbonais]

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Hi Folks....

    This from my Schumann's "Gemstones of the World"..... 

          "Opaque, limonite-bearing layered chalcedony with iridescence
          which is created through diffraction of the light by the
          layered structure." 

    For some reason, I seem to remember seeing somewheres that the
    irridescent "globes" one sees are referred to as "oolites" or
    "oolitic" something or others.. 

    Curiously, in a book with lots of pictures, Schumann's did not
    picture any fire agate.... 

    Good place to see just how amazing this stone can be.... 

    http://www.fireagate.com 

    The ring I wear the most is a basic fire agate (courtesy Gerry
    Galarneau), brown background that puts out an interesting variety of
    colors depending upon the light... 

    It's a durable stone, too....I'm hard on everyday jewelry....or
    maybe just a klutz....<G>... 

Gary W. Bourbonais
A.J.P. (GIA)

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