[Jewelry making - Article 00025] - Re: [Orchid] Holly Blue Agate Vs Chalcedony?

[coralnut]

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Noel,

    Holly blue agate IS chalcedony. 

    Chalcedony describes a fine grained microcrystalline silica bases
    quartz that is massive; never in crystal form but can be mammilary,
    botryordal, etc., often with concentrically or parallel bands (though
    not strongly banded in different colors as agate). It is usually
    translucent, though can be nearly opaque and normally occurs in a
    light to medium color, usually singular but sometimes two or three
    colors together. 

    Cheers from Don at The Charles Belle Studio in SOFL where simple
    elegance IS fine jewelry!


 
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