[Jewelry making - Article 00100] - Re: [Orchid] Agatized dinosaur bones

[leonid surpin]

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>     That's abuse of the english language. If you use 'agatized' that's
>     exactly what that noun used as a verb 'agatized' means.

    When process is described as agatized, but emphasis is made that the
    final result is distinct from agate, the motivation is not to get
    cute with English, but to say that formative processes were similar. 

    That requires an explanation. 

    Animal bone is composed of minerals and organics. Upon animal demise,
    organics are destroyed very quickly by bacteria, leaving empty
    spaces. These spaces, given the right conditions, are filled up with
    minerals, which may or may not be quartz, but the process of filling
    is similar to the process played out in agate formation. 

    These small spaces effectively become micro geodes, inside of which,
    the crystallization of minerals take place layer by layer, in the
    same manner like inside a regular geode. 

    Parallel to that, the mineral component of the bones is also
    changing. In the presence of hydrothermal fluids, the metasomatic
    processes insure that Calcium will be replaced with Silicon; so the
    term silicification, which used sometime, is justified. 

    The resulting material is a conglomerate ( term loosely used ) of
    nodules composed of different minerals, formed in agate like manner,
    within a matrix of silicified bone. 

    So if someone asks how a dinosaur bone get look that way, I can give
    long winded explanation as the one I used above, or I can simply say
    that the bone was agatized. 

    Agatized is simply the most accurate description of the process
    encoded in one word. 

Leonid Surpin.
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