[Jewelry making - Article 00897] - Re: [Orchid] Fire agates

[songofthephoenix]

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    Hi Jan. I've never heard of fire agates losing color.  I have several
    that were cut decades ago and are still beautiful. 

    The only thing that seems plausible to me is that possibly the thin,
    top layer of chalcedony over the bubbles of color has begun to
    delaminate - perhaps due to the stresses or angles of grinding when
    it was cut.  I'm thinking that if the sides were shaped from the base
    toward the dome, the stresses may have separated the layers at an
    edge and with time, the "crack" traveled further allowing air into
    the space which would disrupt color effect. 

Pam Chott
www.songofthephoenix.com


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