[Jewelry making - Article 00195] - Re: [Orchid] Brittle Carnelian

[Terry Ogden]

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Ivy

>     When you look at the cut side of the stone, you see a carnelian
>     red colored region around the perimeter and then a lighter
>     browny-yellowish region in the center. Can anyone tell me whether
>     this is characteristic of heat treatment or dying? 

    It is died, heating will go all the way through. When died, the
    color is very shallow about 1 or 2 mm, heating goes all the way
    through when done properly. Some of my early attempts were improper
    and only ran about 1/2 inch and then gradually tapered to the
    original color. Carnelian and many of the chalcedony materials dye
    readily, but it is thin. 

Terry
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