[Jewelry making - Article 00032] - Re: [Orchid] Holly Blue Agate Vs Chalcedony?

[Wayne Emery]

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>     What is the difference between holly blue agate and chalcedony 

    Nothing. Chalcedony is the cryptocrystalline variety of quartz.
    Agate fits the definition. Holly Blue is a little purplish,
    Ellensburg agate is a little grayish, the Namibian material is
    grayish to very blue, lots of local varieties....all chalcedony. 

Wayne


 
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