[Jewelry making - Article 01032] - Re: [Orchid] Expensive socket for a cheap gem

[leonid surpin]

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>     If you paid $50 for a pink topaz, you were taken for a ride. Topaz
>     doesn't come in pink-- it is a coating, like on sunglasses, worth
>     pretty much nothing. I wouldn't set it at all, as the color will
>     wear off over time, let alone in a $600 setting. 

    There is some misconception about pink topaz. 

    First of all natural topazes do come in pink. Second, artificially
    pink coloring is not a coating. 

    Brown and yellow topazes from some location will become pink if
    heated to 400 - 500 degrees Celsius. This process was invented around
    1740 in France. 

    What referred to as coating, the proper name is thermo-diffusive
    coloring and the colour obtained is red-orange and red-violet, but
    not pink. In any even, the coating will not wear off in normal day to
    day wear. 

    I would not have a problem mounting pink topaz in the expensive
    setting. 

Leonid Surpin.
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