[Jewelry making - Article 00747] - Re: [Orchid] Red tiger eye

[Gerry]

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    All, I have cooked tigereye to a very nice red color in my barbeque. 
    Beware tho, you can cook it too much and it will turn to a chalky red
    that is very brittle.  I have never been able to obtain the three
    colors of red, blue, and gold by heat treating in one piece.  All the
    pieces I have treated became totally red.  My estimate is that a
    temperature of 450 -500 degrees fahrenheit is what is needed to
    change the color. 

    Gerry Galarneau, in still hot Phoenix, Arizona.  Cutting cabs from
    Crinoid Marble, Script Jasper, Picasso Marble, etc.... 


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